Files
ctask/notes.md
T

717 lines
86 KiB
Markdown
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
# ctask — Session Handoff Notes
Last touched: 2026-05-15. **v0.6 Phases 13 are all implemented and verified on branch `feat/v0.6-multi-agent-config` (18 commits ahead of `main`, NOT yet merged). Version is bumped to `0.6.0`. The branch is feature-complete for v0.6 and awaiting review before the merge into `main`. The installed binary at `%LOCALAPPDATA%\ctask\bin\ctask.exe` is still `v0.5.4` — the branch builds locally but has not been installed.**
## Where we are
- **`main`:** v0.5.4 (session-visibility polish). Tip at merge commit `10b7d5a`; version-bump commit `7704cd9`. Installed binary at `%LOCALAPPDATA%\ctask\bin\ctask.exe` is `v0.5.4`. Not refreshed — the v0.6 branch builds locally but has not been installed.
- **Active branches:** `feat/v0.6-multi-agent-config` — 18 commits ahead of `main`, all under the v0.6 theme (Phase 1 + Phase 2 + Phase 3). Not yet merged.
- **Pending action:** review of v0.6 Phase 3, then merge `feat/v0.6-multi-agent-config` into `main`. Do not merge before explicit approval.
- Remote: none (local-only, intentional — see `CLAUDE.md`).
- `ctask doctor` reports 5 pass/fail + 2 seed-directory + 1 `CTASK_PROJECT_ROOT` check + 1 `Session mode` INFO line + 1 tmux INFO/FAIL line (when persistent mode is configured) + the new v0.6 `── Settings ──` block with per-key source attribution.
### What v0.4 delivered (still true, unchanged)
Workspace concurrency protection — session lease with heartbeat (Layer 1), metadata write lock (Layer 2), stale-workspace detection (Layer 3), session handoff summary (Layer 4). `--force` flag on `resume`/`last`/`open`. `WriteMetaLocked`, `LaunchOpts.Force`, `Preflight`. All unchanged in v0.5.
### What v0.4.1 delivered (still true, unchanged)
Correctness and polish: `config.SearchRoots()` multi-root discovery; two-depth `scanWorkspaces` (flat + category, first-match-wins); nested-git documentation; doctor seed-dir three-state checks; archive active-session warning with non-TTY refuse; provisional-cleanup exit-code gate. Still load-bearing — see "From v0.4.1" section below.
### What v0.5 delivered
Theme: **separate workspace management from project code**. `--project` now scaffolds a project subdirectory and session commands `cd` into it. Twelve commits on `main` (`175fbb0..8130a68`).
1. **`launch_dir` field in `TaskMeta`** (`175fbb0`)
- New `LaunchDir string` with `yaml:"launch_dir,omitempty"` — empty for tasks and pre-v0.5 projects, defaults to the project slug for new projects.
- Omitempty keeps on-disk task.yaml clean for backward compatibility.
2. **`workspace.ResolveLaunch` helper** (`dcb1610`)
- Converts a relative `launch_dir` into an absolute child-cwd with three outcomes:
- Valid dir → return absolute path, no warning, no error.
- Missing path (`os.IsNotExist`) or path-is-a-file → return `(wsDir, warning, nil)` so the caller warns and falls back.
- Absolute path, `..`-escape, or any non-`IsNotExist` stat error (permission, ENOTDIR, invalid name) → return `("", "", error)` — caller must surface.
- This asymmetry is deliberate — masking a permission error as a warning fallback would silently strip launch-dir semantics.
3. **Project subdirectory scaffolding** (`7cfafdc`)
- `ctask new --project` creates an empty subdir named after the **final suffixed slug** (so `dup-2` collisions produce matching `dup-2/` subdir).
- ctask does not seed anything inside the subdir — the user places their own CLAUDE.md, source code, project configuration.
- Task workspaces are completely unchanged — no subdir, no `launch_dir`.
4. **`CTASK_LAUNCH_DIR` env var** (`509a6d6`)
- Added as a 7th arg to `config.EnvVars`. All three cmd callers (`new`, `resume`, `open`) pass `ws.Meta.LaunchDir`.
5. **Session launch routed through `LaunchDir`** (`103f2cd`)
- `LaunchOpts.LaunchDir` added. `session.Run` calls `ResolveLaunch` before banner/exec, prints any warning to stderr, aborts on security error, and passes the absolute path to `shell.ExecAgent` / `shell.ExecShell` as the child's working directory.
- Banner gains a `[ctask] project dir: <name>/` line when `launch_dir` is set.
- Lease, manifest, heartbeat, and summary scope stays the **workspace root** — only the child's cwd changes.
6. **`ctask info` shows launch fields** (`cdff7f3`)
- For workspaces with `launch_dir` set, info prints `Launch dir:`, `Launch path:`, and `Dir exists: yes|no` (via direct `os.Stat`, not via `ResolveLaunch` — info is a display command, not a launch command).
7. **`SearchRoots` default fallback** (`47430a1`)
- When `CTASK_PROJECT_ROOT` is unset, `SearchRoots()` now appends `$CTASK_ROOT/projects/` so default-location projects are findable from any shell (resolves the v0.4.1 env-var scoping footgun from the previous follow-up list).
- Dedupe in `scanAllRoots` prevents duplicate results when the same workspace is reachable via both the depth-2 scan under `CTASK_ROOT` and the explicit `$CTASK_ROOT/projects/` search root.
8. **Doctor `CTASK_PROJECT_ROOT` check** (`70bd167`)
- Three-state, matching the `checkSeedDir` pattern: `[INFO]` when unset (points at `$CTASK_ROOT/projects/`), `[INFO]` with user-scope advisory when set+exists, `[FAIL]` when set but missing. Only FAIL increments the failure counter.
- Wording is advisory ("recommended: set at user scope…"), not prescriptive.
9. **Project CLAUDE.md template rewrite** (`cdf1c55`)
- Adds a "Workspace Structure" section explicitly describing the root-vs-subdir split.
- Keeps the "Git" section from v0.4.1, now with an explicit mention that the project subdir is tracked by the root repo.
10. **Status line helpers show effective launch path** (`0976dce`)
- Both `.sh` and `.ps1` build `DISPLAY_PATH = $CTASK_WORKSPACE + (CTASK_LAUNCH_DIR if set)`. When `CTASK_LAUNCH_DIR != CTASK_TASK`, the tag becomes `|project:<launch_dir>` (user-overridden launch directory).
11. **Docs updated** (`82c9445`)
- `docs/commands.md`: workspace-layout diagram, `launch_dir` semantics (default, override, fallback vs error), `CTASK_LAUNCH_DIR` env var, doctor example with new INFO line, Query Resolution default-discovery paragraph.
12. **Version bump `0.4.1` → `0.5.0`** (`8130a68`).
### What v0.5.1 delivered
Two rounds shipped under the v0.5.1 tag: **wall-clock date for user-facing surfaces** (`a162aec`, `a11d48b`) and **Linux portability baseline** (`7a7b249`, `1033072`).
#### Round 1 — date fix (a162aec, a11d48b)
- **Bug:** workspace directory names used UTC date, so at 20:22 EDT on April 22 a new workspace was named `2026-04-23_foo`. Confusing in file explorer, `ctask list`, and `ctask info`.
- **Fix:** `internal/workspace/create.go` now uses `time.Now()` (local) for the directory-prefix date and the `YYYYMMDD-HHMMSS` ID. `cmd/info.go` formats `Created` / `Updated` / `Archived` with `.Local()`.
- **Stored timestamps still UTC.** `task.yaml` `CreatedAt` / `UpdatedAt` / `ArchivedAt`, session logs, lease, manifest, and summary all continue to store UTC. Only user-facing surfaces (directory prefix + info display) switched.
- **Regression guards:** `TestCreateDirectoryPrefixUsesLocalDate` and `TestInfoFormatsTimestampsInLocalZone` enforce both invariants.
#### Round 2 — Linux portability baseline (7a7b249, 1033072)
- **Build targets** (`justfile`): `build-linux`, `build-windows`, `build-all` output to `dist/`. Both cross-targets force `CGO_ENABLED=0` so the artifact is pure-Go statically linked regardless of build host (a native Linux build otherwise defaults to `CGO_ENABLED=1` and links against host glibc).
- **POSIX install scripts** (`scripts/install.sh`, `scripts/uninstall.sh`): mirror the `.ps1` UX. Default install dir `~/.local/bin`, optional override arg, PATH check warns with the right shell snippet (zsh / bash / fallback) — the script does NOT modify shell config. Statusline helper `ctask-statusline.sh` ships alongside the binary; the `.ps1` helper is intentionally not installed on Linux. Workspace data is preserved on uninstall.
- **`.gitignore`** now covers `ctask`, `ctask-*`, `dist/` (in addition to `*.exe`).
- **`WorkspacePath` removed from `TaskMeta`.** The audit (`audit-report.md`) confirmed the field was write-only with no production readers — it persisted an absolute Windows path into `task.yaml` that would have been misleading on cross-OS shares. Existing `task.yaml` files with `workspace_path` continue to load (Go's YAML unmarshal silently ignores unknown fields). `TestMetaTypeMissingDefaultsToTask` keeps the legacy YAML literal in its fixture as a backward-compat regression guard.
- **Validation:** Windows `go test ./...` green across all 7 packages; cross-compile produces ELF x86-64. **WSL-native validation passed:** `go test ./... -count=1` green; `just build-linux` produces a `statically linked` ELF (`ldd` reports `not a dynamic executable`); `./scripts/install.sh` installs to `~/.local/bin/ctask` and registers the statusline helper; `ctask doctor` recognizes the Linux statusline helper.
### What v0.5.2 delivered
Theme: **workspace retrieval and cross-workspace context**. Five feature commits (`a5e508b..3b6be0d`) plus a version bump (`5910100`).
- **Three new direct-lookup commands** (`176e788`):
- `ctask restore <ws>` — un-archive (metadata-only flip; mirrors archive's lease guard; refuses already-active workspaces)
- `ctask notes <ws>` — stream `notes.md` to stdout raw, no framing; `[ctask]`-prefixed stderr on missing file (`SilenceErrors: true` so the spec format is the only diagnostic shown)
- `ctask path <ws>` — print absolute filesystem path on one line, OS-native separators
- **Direct-lookup commands are archived-inclusive by default** (`b923ae8`). The `--all/-a` flag was dropped from `info` entirely; the `Status:` line in info output surfaces archived state. `delete` and `open` keep their `--all` flags (they are potentially destructive). `resume` and `archive` resolve archived-inclusive then filter, so they can give actionable error messages.
- **`ctask resume <archived-ws>` prints a restore hint** (`b923ae8`):
```
[ctask] error: workspace "X" is archived
To restore it:
ctask restore X
```
Genuine not-found and ambiguity behavior preserved.
- **`ctask list --names`** (`56d2e07`) — machine-readable enumeration. One workspace directory basename per line, no header. Empty stdout on no match (no "No workspaces found." placeholder). Honors all existing list filters. Spec invariant `TestListNamesCandidatesResolveUniquely` enforces that every emitted line resolves to exactly one workspace.
- **Shell completion via Cobra** (`176e788`, `b923ae8`). `ctask completion {bash,zsh,fish,powershell}` works through Cobra's auto-injected subcommand. `ValidArgsFunction` hooks per spec policy:
- `resume`, `archive` → active only
- `restore` → archived only
- `info`, `notes`, `path` → both
- `delete`, `open` → active only (flag-aware completion deferred)
Candidates are workspace directory basenames (unique under the resolver's exact-match step), not bare slugs (which can collide across categories or dates).
- **Cross-workspace context section in seed CLAUDE.md** (`3b6be0d`). Both task and project templates teach agents to inspect related workspaces with `list --all` / `info` / `notes` / `path` before starting work, and to treat other workspaces as read-only. Applies to newly-created workspaces only — no retroactive overwrite of existing CLAUDE.md files.
- **Version bump** to `0.5.2` (`5910100`).
**Validation:**
- Windows: `go test ./... -count=1` green across all 7 packages; `go vet` clean; `go build` clean. End-to-end smoke against the binary covered the full archive ↔ restore cycle plus completion-script generation.
- WSL/Linux: refreshed validation copy; reinstalled via `install.sh`; full smoke checklist passed (16 behaviors across new + active + archived + restore + completion). Cross-built Linux binary is statically linked (`file` reports `statically linked`; `ldd` reports `not a dynamic executable`).
### Known limitation (v0.5.2)
- ~~**`ctask resume <archived-ws>` prints `Error: workspace archived` below the actionable hint.**~~ Resolved in v0.5.4 (`ae9bfaf`) via the `errArchivedWorkspace` sentinel + conditional `SilenceErrors`. Other resume errors still flow through Cobra's default rendering.
### What v0.5.3 delivered
Theme: **persistent session mode via tmux** — workspaces can survive terminal disconnect, get reattached from a different terminal, and recover orphaned ownership when a previous foreground ctask died. Merge commit `1e93332`; final polish commit `c204d87`.
User-facing surface:
- New env var `CTASK_SESSION_MODE` (`direct` | `persistent`); `direct` is the default and requires no setup. Unknown values fall back to `direct` with a stderr warning.
- `ctask attach <workspace>` — always-tmux entry command (ignores `CTASK_SESSION_MODE`). Defaults to launching the agent; the `--shell` flag swaps in an interactive shell.
- `--direct` flag on `new` / `resume` / `last` / `open` to bypass persistent mode for one invocation. When a tmux session already exists for the workspace, the user gets a TTY confirmation prompt; non-TTY proceeds with a single stderr warning.
- `ctask doctor` reports `Session mode: direct|persistent` plus an INFO/FAIL line for tmux presence and version when persistent.
- v0.4 lease-prompt tightening (`c204d87`): when entering direct mode on a workspace that already has a live tmux session, the "Continue anyway?" prompt now suggests `<binary> attach <slug>` as the reattach path. Threaded via `PreflightOpts.ActiveLeaseHint` / `LaunchOpts.ActiveLeaseHint`; computed in `cmd/entry.go::directModeTmuxHint` (best-effort: silent when no tmux on PATH or no session for the workspace).
- Invocation name in user-facing command suggestions (`c204d87`): the binary name printed in bypass / restore / "create one with" suggestions reflects `filepath.Base(os.Args[0])` instead of a hard-coded "ctask". Local-build PowerShell users running `.\ctask.exe` see `ctask.exe new <ws> --direct`; installed contexts continue to see `ctask`. Test seam (`cmd/invocation.go::invocationNameOverride`) pins the name to `"ctask"` in unit tests so substring assertions stay stable. Descriptive prose ("ctask persistent mode requires...") and the ssh-remote hint (`ssh -t <host> ctask <subcmd>`) intentionally keep the literal "ctask" — they refer to program identity / remote invocation, not the local command form.
Architecture notes:
- tmux is invoked via a three-call pattern (`has-session`, `new-session -d`, `attach-session`) with a 3-second polling loop to detect session end (`shell.PollInterval`). Polling cadence is below the 30-second heartbeat interval, so finalize lag is bounded.
- Session names are deterministic: `ctask-<sanitized-category>-<sanitized-slug-truncated-30>-<sha256_6>`, where the hash is the first 6 hex chars of `sha256(canonical absolute workspace path)`. On Windows the path is lowercased before hashing (matches `searchRootKey`). tmux's status bar truncates the name aggressively (e.g., `[ctask-pro0:bash*]`) — that's a tmux display thing, not a bug.
- Three entry paths (owner-create, passive reattach, adopted reattach) picked by the pure function `dispatchPersistent(hasTmuxSession, leaseState)`. Passive reattach (`AttachExisting`) runs no Preflight / lease / manifest / heartbeat / banner / finalize — it's a viewer-only attach via `shell.AttachSession`. The owner handles finalize.
- Adoption (`AdoptExistingPersistentSession`) transfers ownership under the metadata write lock with a re-check race guard. The previous lease is replaced, `task.yaml.UpdatedAt` is bumped only on successful adoption, a fresh start manifest is captured, and finalize stamps `session_ownership: "adopted"` plus `adopted_from_orphan_at`.
- The v0.4 four-layer concurrency model is preserved verbatim. Layer 3 is selectively skipped on reattach paths because no reliable end_manifest baseline exists from a previous orphaned owner.
- Provisional cleanup is bypassed in persistent mode (`shouldRunProvisional` returns false on `SessionMode == "persistent"`) — the gate's UX assumption ("Esc on prompt → empty diff → reclaim") does not translate to tmux.
- `last-session-summary.json` gains four optional fields (`end_reason`, `detected_via`, `session_ownership`, `adopted_from_orphan_at`); all `omitempty` so pre-v0.5.3 summaries continue to round-trip.
- Native Windows refuses persistent mode with a WSL recommendation. The check is `runtime.GOOS == "windows" && os.Getenv("WSL_DISTRO_NAME") == ""`. WSL sets `WSL_DISTRO_NAME` automatically, so WSL paths pass. macOS / Linux pass naturally.
- `ctask new` runs the persistent preflight BEFORE `workspace.Create` — a missing tmux must not leave a half-initialized workspace on disk.
Validation:
- Windows host: `go test ./... -count=1` green across all 7 packages; `go vet` clean; `go build` clean; `just build-linux` produces a statically linked ELF.
- Manual WSL smoke test (`docs/superpowers/plans/2026-05-08-v0.5.3-smoke-test-checklist.md`): completed end-to-end on 2026-05-14 across three terminals (WSL-A, WSL-B, PS-C). All sections PASS: owner-create (O1-O3), passive reattach (P1-P2), adopted reattach (A1-A6), non-TTY refusal (T1), nested-tmux refusal, --direct confirmation (D1-D4), tmux-missing workspace-not-created refusal (M1-M4), native Windows refusal (10a-10f), doctor output (11), cleanup (12). T2 (ssh-without-t) skipped — sshd not running on the WSL distro (explicitly allowed by checklist).
- The checklist itself was hardened during the smoke run (10 corrections); see commit `c204d87` for the diff.
Out of scope (deferred):
- Native Windows persistent mode (PSmux is a candidate; not committed).
- Config file (`~/.config/ctask/config.yaml`) — env var remains the only config surface until v0.6.
- `switch-client` for nested-tmux entry, `tmux wait-for` / `set-hook`-based detection, banner injection inside tmux, `ctask sessions` listing command.
### Known limitation (v0.5.3)
- **Refusal/bypass hints reflect `basename(os.Args[0])` for the command-form line, but descriptive prose ("ctask persistent mode requires...") and the ssh-remote hint stay hardcoded as "ctask".** Intentional — descriptive prose refers to program identity, and the ssh-remote `ctask` runs on the remote, not the local binary. **v0.5.4 audit confirmed this split is the right line** (spec §2 codified it: command-form via `invocationName()`, product-identity literal). Closed.
- ~~**Adoption requires waiting 60s for the previous owner's lease to go stale (`StaleLeaseAfter`).**~~ **RESOLVED in v0.6 Phase 3.** A lease whose owner PID is confirmed dead on the local host is now treated as stale immediately via the PID-aware `IsStale` predicate — the 60s wall-clock wait no longer applies to a Ctrl-C'd / terminal-closed local session. See "What v0.6 Phase 3 delivered".
### What v0.5.4 delivered
Theme: **session visibility + polish**. Pure polish — no new subsystems, no new metadata fields, no behavioral changes to session lifecycle. Merge commit `10b7d5a`.
Commit list:
- `7f2c43d` `feat(v0.5.4): SessionStatus display-only helper` — new `internal/session.SessionStatus(wsDir)` returning `{State, Mode, PID, Hostname, Diagnostic}`. Pure read of `.ctask/session.json` with no tmux invocation, no PID liveness, no lock acquisition, no mutation. States: `none` | `active` | `stale`. Pre-v0.5.3 leases without a `mode` field default to `direct` for display only. Display-only contract — lifecycle code keeps using `ReadLease`/`IsFresh`/`InspectLease`.
- `e0e9cd7` `feat(v0.5.4): info Session block` — `ctask info` adds a Session block between `Path:` and the launch-dir fields. Mode/Owner/Attach/Note rows aligned at column 14. Owner line omits hostname when it matches the local machine. Attach hint surfaces only for active+persistent and uses `invocationName()`. Malformed leases render as stale with a diagnostic and no Mode/Owner/Attach rows. Exposes `session.CurrentHostname()` so the cmd layer has a single source of truth for the local-vs-remote check.
- `0c8076a` `feat(v0.5.4): list SESSION column` — `ctask list` gets a SESSION column inserted right of STATUS. Values: `direct`, `persistent`, `stale`, or em dash. Archived workspaces always show em dash (display simplification — `info` still surfaces the raw lease state for diagnostic purposes). One short lease-file read per workspace; `ctask list --names` is **unchanged** (basename-only, no header, no session column — protected by `TestListNamesUnchangedHasNoSessionColumn`).
- `0fb8de6` `polish(v0.5.4): invocation-name audit + regression tests` — audit walked every `cmd/` and `internal/` file producing user-facing text. **No production code changes were needed** — v0.5.3's `c204d87` had already routed every command-form hint through `invocationName()`. Two new regression tests pin a non-canonical name (`my-bin`) for the resume restore hint and the Layer-1 active-session attach hint, so a future change that hard-codes "ctask" in the format string fails loudly. Extracted `formatResumeRestoreHint` and `formatDirectModeTmuxHint` as testable string-only helpers; production paths are behaviorally identical.
- `4fd0bef` `docs(v0.5.4): rewrite commands.md as a structured reference` — `docs/commands.md` was last substantively updated in v0.5; v0.5.2 (restore/notes/path/list --names/completion + archive-inclusive lookup), v0.5.3 (attach + --direct + persistent session mode), and v0.5.4 (info Session block + list SESSION column) were all undocumented. Rewrite follows spec §3 (Purpose / Usage / Scenarios / Examples / Flags / Notes / Related per command) with new sections for workspace layout, env-vars table, query resolution, session modes, and shell completion. Examples use the canonical `ctask` name per spec — docs describe the product, not the user's local binary path.
- `ae9bfaf` `polish(v0.5.4): suppress Cobra duplicate Error on archived resume` — closes the v0.5.2 cosmetic-only known limitation. New `errArchivedWorkspace` sentinel; `runResume` flips `SilenceErrors=true` only when the inner error is that sentinel. All other resume errors (lookup failure, metadata write failure, etc.) flow through Cobra's default rendering unchanged. Verified end-to-end through Cobra `Execute()` (not just `runResume` direct invocation) so the SilenceErrors-flip-from-RunE timing is exercised by `TestResumeArchivedHintNoDuplicateError`.
- `7704cd9` `release(v0.5.4): bump version to 0.5.4`.
- `10b7d5a` `Merge branch 'feat/v0.5.4-session-visibility-polish' into main`.
Validation:
- Windows host: `go test ./... -count=1` green across all 7 packages; `go vet ./...` clean; `just build` produces `ctask.exe`; `just build-linux` produces a statically linked ELF (`file` reports `statically linked, not stripped`); `just install` succeeded; installed `ctask --version` reports `0.5.4`; `ctask doctor` 5/5 pass.
- Smoke (synthetic fixtures): `ctask list` shows SESSION column with `persistent` / `direct` / `stale` / em dash; `ctask list --all` shows em dash for archived even with stranded lease; `ctask list --names` remains basename-only with no whitespace and no session tokens; `ctask info <active-persistent>` shows the Session block with hostname omitted (local) and Attach hint via `invocationName()`; `ctask resume <archived>` prints only the `[ctask]` block + restore hint (no trailing Cobra `Error:` line).
- No manual WSL smoke needed — v0.5.4 changes are display-only and exercised by unit tests against real lease fixture files.
Spec deviations (intentional, not bugs):
- **The v0.5.4 spec referred to `.ctask/lease.json` and a `session_mode` field; the actual existing implementation uses `.ctask/session.json` and `mode`.** The implementation correctly followed the existing metadata names per the spec's "no new metadata fields, no behavioral changes" constraint — renaming would have been a v0.5.3 schema change masquerading as polish. Future specs touching this surface should use `.ctask/session.json` and `mode` unless intentionally renaming the metadata.
- **The invocation-name audit found no production hardcoded command-form hints to change.** v0.5.3's `c204d87` had already done the work. v0.5.4 added two regression tests (`TestInvocationNameInActiveSessionPrompt`, `TestInvocationNameInRestoreHintNonCanonical`) that pin a non-canonical invocation name to prevent future drift. The split between command-form (uses `invocationName()`) and product-identity (literal `"ctask"`) is the codified rule per spec §2.
### What v0.6 Phase 1 delivered (branch `feat/v0.6-multi-agent-config`, NOT merged)
Theme: **infrastructure foundation for v0.6** — global config file, schema versioning in task.yaml, and source attribution in doctor/info. Five commits on the feature branch; no version bump (lands at end of Phase 3). All Phase 1 spec items (`v0.6-spec.md` sections 14) covered, plus a follow-up commit added on reviewer request for the native-Windows session_mode launch-time warning.
#### Commit list (oldest → newest)
- `6f80c8b` `feat(v0.6): config file parser + resolver + source attribution`
- `internal/config/configfile.go` — strict-key YAML parser; unknown top-level keys invalidate the whole file with the offending key named; future schema versions rejected with an upgrade message. Platform-appropriate path (`$XDG_CONFIG_HOME/ctask/config.yaml` → `~/.config/...` fallback on Unix; `%APPDATA%\ctask\config.yaml` on native Windows).
- `internal/config/resolver.go` — `Resolver` / `ResolvedSetting` / `SettingSource` with five values (`Builtin`, `ConfigFileSrc`, `EnvVar`, `CLIFlag` reserved for v0.6 Phase 2, `PlatformOverride`). Each setting carries an `Override` chain so doctor can render `env var (overrides config file: X)`. Per-setting methods: `CtaskRoot`, `ProjectRoot`, `SeedDir`, `DefaultAgent`, `DefaultCategory`, `Editor`, `SessionMode`. `SessionMode` applies the native-Windows platform override at the resolver layer with the configured value chained as `Override`. Exports `SetConfigPathForTest` and `SetIsNativeWindowsForTest` so cross-package tests can isolate.
- `internal/config/config.go` — legacy `ResolveRoot` / `ResolveAgent` / `ResolveSeedDir` / `ResolveProjectRoot` / `ResolveSessionMode` wrappers migrated to `LoadResolver()` so config-file values take effect for entry commands. `ResolveProjectRoot` preserves the `""` sentinel for `Builtin` source so `SearchRoots` and doctor's `checkProjectRoot` keep their v0.5 fallback semantics. `ResolveSessionMode` keeps the unknown-value stderr warning, distinguishing env-var vs config-file sources in the message.
- Tests: 6 LoadConfigFile + 3 ConfigFilePath + 11 resolver cases including layering, override chains, path expansion, platform override, and `SettingSource.String()` rendering.
- `0b21b8d` `feat(v0.6): schema_version and workspace.mode in task.yaml`
- `CurrentMetaSchemaVersion = 1` constant + `WorkspaceSection struct{ Mode string }` nested block.
- `TaskMeta` gains `SchemaVersion int` and `Workspace WorkspaceSection` fields at the top of the struct. Both `omitempty` — this is what enforces the no-opportunistic-writes invariant: legacy task.yaml files (no `schema_version`, no `workspace:`) round-trip through `WriteMeta` / `WriteMetaLocked` without acquiring those keys.
- `EffectiveSchemaVersion(meta)` returns 1 for stored-value-0 legacy workspaces; non-zero stored values pass through verbatim.
- `ValidateSchemaVersion(slug, meta)` rejects values above `CurrentMetaSchemaVersion` with the spec-mandated upgrade message; `ValidateWorkspaceMode(slug, meta)` rejects values other than `""` and `"native"` (so a Phase 1 binary refuses an "adopted" mode set by hand or by a future v0.7).
- `ReadMeta` now runs both validators after YAML unmarshal. The error includes the workspace slug (derived from the file's `slug:` field or the directory basename when the file itself is corrupt).
- `workspace.Create` stamps every new meta with `SchemaVersion: 1` and `Workspace.Mode: "native"`. This is the ONLY write site for these fields in v0.6.
- Tests: 10 cases including the dedicated `TestLegacyTaskYamlNotBackfilledByWrite` and `TestLegacyTaskYamlNotBackfilledByLockedWrite` regressions that pin the no-opportunistic-writes invariant.
- `c918e5c` `feat(v0.6): doctor Settings section with source attribution`
- New `── Settings ──` block appended between the existing `checkTmux` line and the `N checks passed, M failed` summary. Loaded via `config.LoadResolver()` exactly once per `runDoctor` invocation and reused across every settings line (per user correction: "load the resolver once and reuse it").
- First emits the config-file lifecycle line: `not found` (INFO), `<path>` (valid, INFO), or `<path>` + `[FAIL] unknown key: "..."` + advisory (invalid, increments `failed`).
- Then iterates `r.CtaskRoot() / ProjectRoot() / SeedDir() / DefaultAgent() / DefaultCategory() / SessionMode() / Editor()` and renders each via `printSettingLine` (key/value/source trio + chained-override info). `PlatformOverride` adds a `configured: <value>` row so doctor surfaces both the effective and the user-asked-for value.
- Helper `formatSettingSource` centralises the `EnvVar → CTASK_X env var` / `PlatformOverride → ... (persistent mode requires tmux; not available on native Windows)` / override-chain wording.
- Tests: 6 cases including the platform-override `configured: persistent` rendering.
- `937a1c8` `feat(v0.6): info source attribution on Agent and Launch session mode`
- `cmd/info.go::runInfo` calls `config.LoadResolver()` once and reuses it.
- `Agent:` line gains `(workspace)` when `m.Agent` is non-empty (the common case), or `(default)` / `(default — <source>)` when the legacy field is empty and the value falls through to the resolver.
- New `Launch session mode:` row inserted directly between `Agent:` and `Created:`, **outside** the v0.5.4 Session block (per user decision: the Session block represents the current lease's recorded mode; the new line represents the configured launch default — two different things).
- Helper `infoSourceLabel` is the info-side counterpart to `formatSettingSource`. No override-chain suffix in info (single-row layout has no room for the extra parenthetical).
- Tests: 5 cases including a placement check that asserts `Agent < Launch session mode < Created` in the rendered output.
- `6182d89` `feat(v0.6): platform-override stderr warning on launch paths`
- Reviewer follow-up: the v0.6 spec section 1.8 also calls for a stderr warning at launch time when persistent mode is downgraded; commits 14 covered the doctor/info display path but the launch paths were still downgrading silently. This commit fixes that.
- New helper `cmd/persistent.go::emitPlatformOverrideWarningIfNeeded(alwaysPersistent bool)` — loads the resolver, emits the warning on stderr when `SessionMode()` reports `PlatformOverride` source AND the caller is not `AlwaysPersistent`.
- Single call site at the top of `cmd/entry.go::defaultRunWorkspaceEntry`, before any launch work. That function is the funnel for `new`, `resume`, `last`, `open` (which can downgrade) AND `attach` (which can't). attach sets `AlwaysPersistent: true`, so the helper short-circuits.
- Warning text (exact): `[ctask] warning: persistent session mode is not supported on native Windows; using direct mode. Use WSL for persistent sessions.`
- "Once per invocation" is provided implicitly by the call site running at most once per ctask command — no warn-once subsystem.
- Tests: 5 cases including the AlwaysPersistent skip gate. attach's actual native-Windows refusal contract (via `preflightPersistentEntry`) continues to be enforced by the pre-existing `TestPreflightRefusesNativeWindows`.
#### Verification (run on `feat/v0.6-multi-agent-config` tip `6182d89`)
- `go test ./... -count=1` — all 7 packages `ok`, 0 failures.
- `go vet ./...` — exit 0.
- `go build -o ctask.exe .` — exit 0.
- `just build-linux` — produces `dist/ctask-linux-amd64`, statically linked ELF (`file` reports `statically linked`).
- Version remains `v0.5.4`; bump deferred to the end-of-Phase-3 commit per `v0.6-spec.md` "Commit ordering".
#### Phase 1 constraints held
- **No config auto-creation.** `LoadConfigFile` returns `(nil, nil)` on `IsNotExist`; nothing in the codebase writes a config file. Missing file renders as INFO in doctor, never FAIL.
- **No opportunistic schema writes.** The two new task.yaml fields use YAML `omitempty`; legacy files round-trip through `WriteMetaLocked` (the path used by `resume` / `archive` / `restore`) without acquiring `schema_version` or `workspace:`. Pinned by `TestLegacyTaskYamlNotBackfilledByWrite` + `TestLegacyTaskYamlNotBackfilledByLockedWrite`.
- **Env vars preserved as overrides.** The resolver layers them above config; no deprecation. Override chain captured in `ResolvedSetting.Override` so doctor renders `CTASK_X env var (overrides config file: Y)`.
- **task.yaml remains workspace state.** Phase 1 does NOT introduce per-workspace fields like `agent.type` or fold task.yaml into the resolver chain. The Agent and Launch session mode lines in info correctly distinguish `(workspace)` from user-level-default sources.
- **No Phase 2 work started.** Verified by diff: no agent-profile fields in `TaskMeta`, no `--agent` flag on `ctask new`, no AGENTS.md / CLAUDE.md shim generation, no `ctask agents check`, no `context/notes-archive/` scaffolding. `internal/seed/templates.go` unchanged.
- **No Phase 3 work started.** Verified by diff: no PID-liveness logic, no changes to `internal/session/lease.go` or `internal/session/adopt.go`, no change to the 60s `StaleLeaseAfter` threshold or its callers.
#### Native-Windows platform-override behavior (codified in Phase 1)
- **Doctor + info show source attribution.** Doctor's Settings block renders `session_mode: direct` + `source: platform override (...)` + `configured: persistent` when config says persistent on native Windows. Info's `Launch session mode:` line surfaces the same effective value with its source label.
- **Launch paths warn once per invocation and downgrade to direct.** `new`, `resume`, `last`, `open` all funnel through `defaultRunWorkspaceEntry`, which calls `emitPlatformOverrideWarningIfNeeded(false)` at the top. Exactly one stderr line per process invocation. No warn-once subsystem — the call site frequency is what enforces "once".
- **`ctask attach` does NOT downgrade.** attach sets `AlwaysPersistent: true`, which (a) bypasses the warning helper and (b) routes through `preflightPersistentEntry` which refuses on native Windows with the v0.5.3 "ctask persistent mode requires tmux ... Recommended: Run ctask from WSL" message. attach has no direct-mode equivalent — refusal is the right contract.
#### Architecture notes (worth preserving)
- **One resolver per command.** `config.LoadResolver()` is cheap (one config file read + env snapshot) but doctor/info call it exactly once per invocation and reuse the result across many `Resolver.X()` accessors. Legacy `Resolve*` wrappers (`ResolveRoot` etc.) each construct a fresh resolver — acceptable for entry commands that call them once or twice; new code in `cmd/` should follow the doctor/info pattern.
- **Test seams are exported.** `config.SetConfigPathForTest(t, path)` and `config.SetIsNativeWindowsForTest(t, f)` are exported helpers so `cmd/`-package tests can isolate from developer-host config files and simulate platform-override scenarios without `runtime.GOOS` skips.
- **Validation lives in `ReadMeta`, not in callers.** The schema-version and workspace-mode checks happen at read time — so any path that gets a `*TaskMeta` has already passed validation. Callers do not need to re-check.
- **`omitempty` is the load-bearing primitive for "no opportunistic writes."** If a future change needs to track another optional field, follow the same pattern: zero value must round-trip without serialization, and only `workspace.Create` (or an explicit migration) writes a non-zero value.
### What v0.6 Phase 2 delivered (branch `feat/v0.6-multi-agent-config`, NOT merged)
Theme: **the multi-agent layer** — ctask is now agent-agnostic. task.yaml carries an agent profile (`type` / `command` / `args` / `env`), `ctask new --agent` selects the agent type, the launch path carries a resolved command + args + env end-to-end, new workspaces get an `AGENTS.md` canonical instruction file (CLAUDE.md becomes a thin shim), and `ctask agents check` validates agent configuration. Six commits on the feature branch; no version bump (lands at end of Phase 3). All Phase 2 spec items (`v0.6-spec.md` §5–§7, plus the §8 seed scaffolding that rides along with the template change) covered.
#### Commit list (oldest → newest)
- `8120c39` `feat(v0.6): AgentSpec field on TaskMeta with backward-compat unmarshal`
- `TaskMeta.Agent` changes from `string` to `workspace.AgentSpec{Type, Command, Args, Env}`. Custom `UnmarshalYAML` accepts both the v0.6 mapping form and the legacy scalar form. **Legacy scalar handling (corrected at plan review):** a scalar matching a built-in name (`claude`, `opencode`) maps to `AgentSpec{Type: <scalar>}`; any other scalar (a path, `aider`, etc.) maps to `AgentSpec{Type: "custom", Command: <scalar>}`; a missing `agent:` key leaves `Type` empty so the resolver fills in `default_agent`. The scalar value is NEVER dropped — a legacy workspace keeps launching the agent it was created with.
- `IsBuiltinAgentType(name)` helper in `internal/workspace` (true for `claude`, `opencode`) — the built-in/custom discriminator used by the unmarshaler. `internal/agent.BuiltinProfiles` mirrors the same set.
- `ValidateAgentSpec` (run inside `ReadMeta`): known type only; `type=custom` requires `command`; `command` rejects whitespace and shell metacharacters (`|&;<>()$\``) with a hint pointing at `args` — ctask does not shell-split.
- `CreateOpts.Agent string` → `CreateOpts.AgentSpec workspace.AgentSpec`. cmd-layer call sites patched to the minimum needed to compile (full wiring lands in commit 3).
- `24f2134` `feat(v0.6): internal/agent package — Resolve + BuiltinProfiles`
- New `internal/agent` package: `Profile`, `BuiltinProfiles` (`claude`, `opencode`), `IsKnownType` (those two + `custom`), `Resolved{Type, Command, Args, Env}`, and `Resolve(spec, defaultAgent)`. Resolution: empty `Type` falls through to `defaultAgent`; `custom` requires `command`; otherwise command is `spec.Command` or the built-in default. **No I/O** — PATH lookup stays in `shell.ExecAgent` and `ctask agents check`, so `Resolve` is trivially testable.
- `b75b82e` `feat(v0.6): launch path carries ResolvedAgent (command + args + env)`
- `LaunchOpts.Agent string` and `WorkspaceEntryOptions.Agent string` → `*agent.Resolved`. All five entry commands (`new`, `resume`, `last`, `open`, `attach`) construct an `AgentSpec`, apply `--agent` as a one-shot `agent.command` override (Open Q 1 — resume/last/attach `--agent` stays a command override, NOT a type selector), call `agent.Resolve`, and pass the result through. `cmd/entry.go::resolveEntryAgent` centralises the resume/last/open/attach path.
- `shell.ExecAgent` and `shell.ExecTmuxAgent` gain an `args []string` parameter. `agent.env` is merged into the child environment at the `session.Run` launch switch, AFTER ctask's own `CTASK_*` exports — `agent.env` wins on collision per spec §5. `session.mergeAgentEnv` is the centralised merge; `var execAgent = shell.ExecAgent` is a new test seam.
- Lease, manifest, write lock, heartbeat, summary, and provisional cleanup are untouched. The `Agent string` fields on `Lease` / `SessionSummary` / `SessionInfo` still record the resolved command string for diagnostics.
- `a61f900` `feat(v0.6): --agent flag on ctask new selects agent type`
- `Resolver` gains `cliFlagAgent` + `SetCLIFlagAgent`; `DefaultAgent()` layers `CLIFlag` above `EnvVar` so doctor/info render the full precedence chain. `SettingSource.CLIFlag` (reserved in Phase 1) is now reachable.
- `ctask new --agent <type>` writes `agent.type` into the new workspace's task.yaml. Resolution + validation run BEFORE `workspace.Create`, so `--agent custom` with no companion command refuses (`type "custom" requires command`) without leaving a half-created workspace on disk. The deferred Phase 1 test `TestCLIFlagOverridesEnvVar` landed here.
- `0c6ed0c` `feat(v0.6): AGENTS.md seed + CLAUDE.md shim + handoff + context-archive scaffold`
- New workspaces get `AGENTS.md` (canonical, always — handoff workflow, notes-archive convention with a ~300-500 line trigger, cross-workspace discovery, do-not-touch warnings; project variant adds workspace-structure + git-conventions sections), a `CLAUDE.md` shim (claude type only — opencode shim deferred), `handoff.md` (minimal current-state template), and `context/notes-archive/.gitkeep`.
- `seed.ClaudeMD` and `seed.ClaudeMDProject` deleted — no callers remain. `seed.NotesMD` retained. Existing workspaces are NOT retroactively modified (pinned by `TestCreateDoesNotModifyExistingWorkspace`).
- `0f96d20` `feat(v0.6): ctask agents check + doctor integration`
- `ctask agents check [workspace]` — pure validation, no launch: agent type known, command resolvable on PATH, launch_dir valid, AGENTS.md present, CLAUDE.md shim present (WARN, claude only). `agent.env` keys displayed informationally; a WARN line names any key shadowing a `CTASK_*` export. Non-zero exit on any FAIL.
- `ctask doctor` runs the same sweep against the most-recently-active workspace (`workspace.MostRecentActive`); skips with `Agent check: skipped (no workspace context)` when none exists. `runAgentsCheckOnWorkspace` is shared between the standalone command and doctor.
- `TestCompletionSubcommandViaExecute` was made order-independent: cobra's default `completion` command captures the root output writer once, on the first `Execute()` in the process — the new agents-check tests run an `Execute()` earlier in the suite, so the test now drops any pre-created completion command before its own `Execute()`.
#### Verification (run on `feat/v0.6-multi-agent-config` tip `0f96d20`)
- `go test ./... -count=1` — all 8 packages `ok` (the new `internal/agent` package included), 0 failures.
- `go vet ./...` — exit 0.
- `just build` — `ctask.exe` builds locally.
- `just build-linux` — produces `dist/ctask-linux-amd64`, statically linked ELF.
- Version remains `v0.5.4`; bump deferred to the end-of-Phase-3 commit.
#### Phase 2 constraints held
- **No PID liveness / lazy-cleanup / adoption changes.** `internal/session/lease.go` untouched; `internal/session/adopt.go` changed only for the mechanical `ResolvedAgent` passthrough. The 60s `StaleLeaseAfter` threshold is unchanged.
- **No per-workspace `session_mode`.** No new field on `TaskMeta` beyond the `AgentSpec`.
- **No user-defined named agent profiles in config.** `internal/config/configfile.go` is unchanged in Phase 2 — agent profiles live in task.yaml, not config.yaml.
- **No opencode-specific shim.** `writeBuiltinDefaults` writes `CLAUDE.md` only when `agent.Type == "claude"`.
- **No auto-modification of existing workspaces.** All new seed files are written only by `workspace.Create`.
- **No version bump, no merge.** `version.go` untouched; branch stays `feat/v0.6-multi-agent-config`.
#### Architecture notes (worth preserving)
- **`internal/agent.Resolve` is I/O-free.** PATH validation is deliberately NOT in `Resolve` — it lives in `shell.ExecAgent` (fail-fast at launch) and `ctask agents check`. This keeps resolution a pure function and lets `agents check` validate without launching.
- **`agent.env` precedence is intentional.** It merges AFTER ctask's `CTASK_*` exports and wins on collision (spec §5). This is a feature, not a bug — `agents check` surfaces the shadowing with a WARN so the user is not surprised.
- **Two parallel built-in-type lists, kept in sync deliberately.** `workspace.IsBuiltinAgentType` / `workspace.knownAgentTypes` and `internal/agent.BuiltinProfiles` both enumerate the built-ins. `internal/workspace` cannot import `internal/agent` (the dependency runs the other way), so the lists are mirrored, not shared. When a new built-in lands, update all three.
- **AGENTS.md is canonical; CLAUDE.md is a shim.** The shim exists only to point Claude Code at AGENTS.md. The seed-overlay rule still applies — a user seed dir's `AGENTS.md` / `CLAUDE.md` overrides the built-in.
- **cobra's default `completion` command captures the output writer once.** `InitDefaultCompletionCmd` snapshots `c.OutOrStdout()` into the `bash`/`zsh`/etc. subcommand closures on the first `Execute()` anywhere in the process. Tests that drive `rootCmd.Execute()` with a redirected output buffer and then assert on completion output must drop the pre-created completion command first. `cmd/agents_check_test.go::captureRootCmd` restores `rootCmd`'s out/err/args on cleanup to limit this class of cross-test contamination.
### What v0.6 Phase 3 delivered (branch `feat/v0.6-multi-agent-config`, NOT merged)
Theme: **lazy-cleanup via PID liveness** — a lease whose owner process is
confirmed dead on the local machine is treated as stale immediately,
without the 60-second wall-clock wait. Closes the v0.5.3 known limitation
(Ctrl-C / terminal-close then immediate `ctask resume`). The v0.6.0
version bump rides along. Four commits; v0.6-spec.md §8 (context-file
scaffolding) was already delivered in Phase 2 commit `0c6ed0c`, so §9
(PID liveness) was the only remaining Phase 3 feature.
#### Commit list (oldest → newest)
- `9070c42` `feat(v0.6): tri-state PID liveness probe (ProcessAlive/Dead/Unknown)`
- New `internal/session/pidcheck.go` (`ProcessState` tri-state +
`checkProcess` test seam) and build-tagged platform files:
`pidcheck_unix.go` (`syscall.Kill(pid, 0)` — `nil`/`EPERM`→Alive,
`ESRCH`→Dead, else→Unknown) and `pidcheck_windows.go`
(`syscall.OpenProcess` — opens→Alive, `ERROR_INVALID_PARAMETER`(87)→Dead,
else→Unknown). Stdlib `syscall` only; no `golang.org/x/sys` dependency,
`go.mod` unchanged.
- `f379a6d` `feat(v0.6): IsStale supplements wall-clock freshness with PID liveness`
- `IsStale(l, now, threshold)` in `lease.go`. Parameterized free
function mirroring `IsFresh` (not the spec's zero-arg method form —
deviation approved at plan review to preserve the package's
injected-clock testability). PID liveness applies only to local
leases (`l.Hostname == currentHostname()`) with `pid > 0`; remote
leases, `pid <= 0`, and `ProcessUnknown` fall back to wall-clock.
Wall-clock staleness is checked first and wins unconditionally — PID
liveness only flips fresh → stale, never stale → fresh.
- `d575ddd` `feat(v0.6): route lease-freshness callsites through IsStale`
- Four freshness consumers now route through `IsStale`: `InspectLease`,
`CleanupStaleLease`, `runActiveLeaseCheck`, and `statusAt`.
`SessionStatus` / `ctask list` / `ctask info` reflect PID liveness
automatically — only the one-line `statusAt` predicate swap was
needed; the `Status` struct and all cmd-layer rendering are
untouched. Also corrected three cmd-package session-display test
fixtures (`list_session_test.go`, `info_session_test.go`) that built
"active" leases with the local hostname but synthetic PIDs — now that
freshness is PID-aware, an honest "active" fixture must use
`os.Getpid()`.
- `beb5174` `chore(v0.6): bump version to 0.6.0`
- `cmd/root.go` `version` `0.5.4` → `0.6.0`. `ctask --version` reports
`ctask v0.6.0`.
#### Verification (run on tip `beb5174`)
- `go test ./... -count=1` — all 8 packages `ok`, 0 failures.
- `go vet ./...` — exit 0.
- `just build` — `ctask.exe` (PE32+ x86-64).
- `just build-linux` — `dist/ctask-linux-amd64`, statically linked ELF
(the only check that compiles `pidcheck_unix.go`).
- Manual interactive smoke (Ctrl-C a live session then immediate
`ctask resume`; stale display in `info`/`list`) — **pending**: requires
a real TTY + agent session and was deferred to hands-on review. The
behavior is covered deterministically by `TestInspectLeaseDeadLocalPIDIsStale`,
the `TestIsStale*` matrix, and the `TestCheckProcess*` real-syscall tests.
#### Phase 3 constraints held
- Four-layer concurrency model unchanged — PID liveness only makes Layer
1's "is this lease stale?" question smarter.
- `StaleLeaseAfter` (60s) unchanged; PID liveness supplements it and
remains the fallback for remote leases and inconclusive checks.
- Lease creation, heartbeat, write lock, manifest, and summary shapes
unchanged. `adopt.go` untouched.
- Remote leases remain wall-clock-only (PID checks skipped when the lease
hostname differs from the current host).
- `IsFresh` retained as the pure wall-clock primitive `IsStale` builds on.
- No new agent/profile/config/template work.
#### Architecture notes (worth preserving)
- **`IsStale` is the single freshness predicate** for stale-detection
decisions. All four callsites route through it; `IsFresh` is now an
internal building block (still exported, still directly tested).
- **PID liveness is conservative by construction.** Only a definitive
`ProcessDead` on a local lease shortcuts the wait. `ProcessUnknown`
(permission errors, unexpected OS errors) and remote leases preserve
the pre-v0.6 wall-clock behavior exactly.
- **No `golang.org/x/sys` dependency.** Windows process probing uses
stdlib `syscall.OpenProcess`; `PROCESS_QUERY_LIMITED_INFORMATION`
(`0x1000`) and `ERROR_INVALID_PARAMETER` (`87`) are local constants.
- **Known conservative edge cases** (acceptable — they never falsely
declare a live owner dead): OS PID reuse reads the recycled PID as
alive → wall-clock fallback; a Windows zombie handle reads as alive.
- **Plan:** `docs/superpowers/plans/2026-05-15-v0.6-phase3-implementation.md`.
### Historical: original Phase 1 plan (now shipped — kept for traceability)
**Phase 1 scope (only thing to start next):**
- **Config file parsing + resolver + tests.** Read `~/.config/ctask/config.yaml` (XDG) and Windows equivalent. Layered resolution: env var > config file > built-in default. Surface every existing `CTASK_*` setting through the new resolver without changing default behavior. Tests cover layering, malformed YAML, missing file, env-var override.
- **`schema_version` field in `task.yaml`.** Bump to `1`. Old workspaces (no `schema_version`) parse silently and are treated as version 0 (current behavior). New `ctask new` writes version 1.
- **`workspace.mode` field in `task.yaml`.** Replaces the implicit "always `local`" assumption. New workspaces default to `local`; reading is forward-compatible. No behavioral consequence yet — purely metadata.
- **Doctor source attribution.** When reporting a configuration value, doctor says where it came from: `[INFO] CTASK_ROOT: /home/warren/ai-workspaces (env)` vs `(config: ~/.config/ctask/config.yaml)` vs `(default)`. Three-state visibility for every resolved setting.
- **Info source attribution.** `ctask info <ws>` includes the source for relevant resolved values (e.g., agent override path).
**Phase 1 do-not-touch (deferred to Phase 2):**
- Agent profiles (`profiles:` block in config).
- AGENTS.md / handoff.md / context-file templates / `context/notes-archive/` scaffolding (the design recorded in `v0.5.4-spec.md` § "v0.6 Context-File Architecture" is for Phase 2 — read it then, not now).
- PID liveness check on leases. v0.5.4 spec §1 explicitly defers this so it's only built once with behavioral consequences.
- Lazy-cleanup-friendly adoption (the 60s `StaleLeaseAfter` revisit).
- `orphaned` session state detection in display.
- Flag-aware completion for `open --all` / `delete --all`.
The scope split exists because Phase 1 is foundation (resolver, schema versioning, source visibility) that Phase 2 features will build on. Implementing them together is what makes v0.6 stall.
## Post-v0.4 bugfixes (still live, carried forward)
### Provisional-workspace cleanup (2026-04-22, commits `02dcdcc`, `ba8b3a1`)
Covered in v0.4.1 notes. The exit-code gate (`childExitCode != 0 && startManifest != nil && emptyDiff && NewlyCreated`) is unchanged in v0.5.
## Tree state at pause
- `main` tip is unchanged: `10b7d5a Merge branch 'feat/v0.5.4-session-visibility-polish' into main` (v0.5.4 shipped).
- `feat/v0.6-multi-agent-config` is the active branch, 18 commits ahead of `main`. Tip `beb5174` (pre-notes-closeout). NOT merged — feature-complete for v0.6, awaiting review then merge.
- No tag pushed for v0.5.4 (no remote — the project is intentionally local-only per `CLAUDE.md`). v0.5.3 had `git tag v0.5.3` locally; v0.5.4 has none. No v0.6 tag yet — a post-merge task.
- Installed `ctask.exe` at `%LOCALAPPDATA%\ctask\bin\ctask.exe` is still **v0.5.4** — the v0.6 branch has NOT been installed. Local `ctask.exe` in the repo root is a `beb5174` build reporting `v0.6.0`. `dist/ctask-linux-amd64` is the Phase-3 Linux cross-build (statically linked ELF).
- Memory follow-ups (see `memory/MEMORY.md`):
- `feedback_design_for_lazy_cleanup` — the 60s-freshness-wait concern it raised is **addressed by v0.6 Phase 3** (PID-aware `IsStale`). The underlying principle (lifecycle UX must recover from Ctrl-C / terminal close) remains a live design value.
- `feedback_invocation_name_in_hints` — partially closed by the v0.5.4 audit (split between command-form and product-identity is now codified). Memory entry retained for the descriptive-prose question.
- Untracked files (do NOT touch without asking — pre-existing session-local working docs, unchanged from this session):
- `.claude/settings.local.json` (modified — Claude Code local settings)
- `bugfix-provisional-workspace.md` (spec for the 2026-04-22 initial provisional fix; may be deleted or archived)
- `docs/superpowers/plans/2026-04-06-install-workflow.md` (install-workflow plan from an earlier session)
- `docs/superpowers/plans/2026-04-21-v0.4-implementation.md` (v0.4 plan — executed)
- `docs/superpowers/plans/2026-04-22-v0.4.1-patch.md` (v0.4.1 plan — executed)
- `docs/superpowers/plans/2026-04-22-v0.5-implementation.md` (v0.5 plan — executed)
- `docs/superpowers/plans/2026-05-08-v0.5.3-implementation.md` (v0.5.3 plan — executed; was claimed-committed in earlier notes but actually stayed untracked)
- `v0.4-spec.md`, `v0.4.1-patch-spec.md`, `v0.5-spec.md`, `v0.5.3-spec.md`, `v0.5.4-spec.md` (specs the implementations followed; `v0.5.4-spec.md` is the spec the just-shipped work was driven from)
- Files committed on the v0.5.4 branch that are now on `main`:
- `internal/session/status.go` + `status_test.go` (SessionStatus helper)
- `cmd/info_session_test.go`, `cmd/list_session_test.go` (session-block / session-column behavioral tests)
- `cmd/invocation_audit_test.go` (regression tests pinning a non-canonical invocation name)
- `cmd/resume_archived_polish_test.go` (Cobra-end-to-end test that the duplicate `Error:` line is suppressed)
- `docs/commands.md` (rewrite — see commit `4fd0bef`)
- Files committed on `feat/v0.6-multi-agent-config` (NOT yet merged):
- `internal/config/configfile.go` + `configfile_test.go` (strict-key YAML parser + ConfigFilePath)
- `internal/config/resolver.go` + `resolver_test.go` (Resolver + ResolvedSetting + SettingSource + 2 exported test seams)
- `internal/config/config.go` modified (5 legacy wrappers migrated to LoadResolver)
- `internal/config/config_test.go` + `config_roots_test.go` modified (config-path isolation in tests that assert Builtin defaults)
- `internal/workspace/metadata.go` modified (CurrentMetaSchemaVersion, WorkspaceSection, SchemaVersion + Workspace fields on TaskMeta, EffectiveSchemaVersion + ValidateSchemaVersion + ValidateWorkspaceMode helpers, ReadMeta validation)
- `internal/workspace/create.go` modified (writes schema_version: 1 + workspace.mode: native)
- `internal/workspace/schema_test.go` (10 tests including the two no-opportunistic-writes regressions)
- `cmd/doctor.go` modified (── Settings ── block + checkSettings + printSettingLine + formatSettingSource)
- `cmd/doctor_test.go` modified (config import + 2 tests gated by SetIsNativeWindowsForTest)
- `cmd/doctor_settings_test.go` (6 tests covering the new Settings block)
- `cmd/info.go` modified (Agent source label + new Launch session mode line + agentLineWithSource + infoSourceLabel)
- `cmd/info_attribution_test.go` (5 tests including placement assertion)
- `cmd/new_persistent_test.go` modified (config import + 1 test gated by SetIsNativeWindowsForTest)
- `cmd/entry.go` modified (emitPlatformOverrideWarningIfNeeded call at top of defaultRunWorkspaceEntry)
- `cmd/persistent.go` modified (config import + platformOverrideWarning const + emitPlatformOverrideWarningIfNeeded helper)
- `cmd/platform_warning_test.go` (5 tests covering the warning + AlwaysPersistent skip)
## How to resume
v0.6 Phase 1 is shipped on `feat/v0.6-multi-agent-config` and reviewed. **The branch is NOT merged into `main` yet** — Phase 2 (and Phase 3) will continue on the same branch per the v0.6 spec's "one branch, three sequential milestones" policy. The eventual merge happens at the end of Phase 3 alongside the version bump.
**Do not begin Phase 2 work** (agent profiles, `--agent` flag, AGENTS.md + CLAUDE.md shim, `ctask agents check`) until the Phase 2 plan is written and reviewed. Phase 3 (PID liveness, lazy-cleanup adoption, context-file scaffolding) does not start until Phase 2 is implemented, tested, and reviewed.
### General resume (on `main` after a ship)
```powershell
cd C:\Users\Warren\claude_tasks\ctask
just test # go test ./... -count=1
just build # or: go build -o ctask.exe .
just install # only reinstall if source changed
```
Quick sanity checks that v0.5.4 is live:
```powershell
ctask --version # expect: ctask v0.5.4
ctask doctor # expect: 5 pass/fail + 2 seed-dir INFO + 1 CTASK_PROJECT_ROOT INFO + 1 Session mode INFO
# v0.5.4 surfaces:
ctask list # SESSION column inserted right of STATUS
ctask list --names # bare basenames, no header, no session column
ctask info <some-active-ws> # Session block between Path: and (if any) launch fields
# Direct mode (the default — no env var needed):
ctask new --project "tz-check" --no-launch
# Expected output: [ctask] created projects/YYYY-MM-DD_tz-check
ctask info tz-check # info should show Session: none for the just-created ws
ctask delete --force tz-check
# Persistent mode sanity (v0.5.3, requires tmux — WSL only):
# (WSL terminal)
export CTASK_SESSION_MODE=persistent
ctask doctor 2>&1 | grep -E "Session mode|tmux"
# Expect:
# [INFO] Session mode: persistent
# [INFO] tmux found: tmux <version> (/path/to/tmux)
unset CTASK_SESSION_MODE
```
### Starting v0.6 Phase 2
Branch is already `feat/v0.6-multi-agent-config`; check it out and continue. **Read the Phase 1 ship report above first** — Phase 2 builds on the resolver and the task.yaml schema fields it landed.
Suggested opening session prompt (paste into a fresh ctask agent session):
> Begin v0.6 Phase 2 implementation planning only. Phase 1 is complete on `feat/v0.6-multi-agent-config` (see `notes.md`). Phase 2 scope per `v0.6-spec.md` sections 57: agent profile system in task.yaml (`agent.type` / `agent.command` / `agent.args` / `agent.env`; built-in types `claude` and `opencode`, escape hatch `custom`), `--agent` flag on `ctask new` with the deferred `TestCLIFlagOverridesEnvVar`, AGENTS.md canonical file + CLAUDE.md shim (claude type only — opencode shim deferred until conventions are verified), and `ctask agents check` validation command. Per spec implementation notes, the AGENTS.md template + `handoff.md` + `context/notes-archive/` scaffold land together in one seed-template change (commit 7 in the spec's ordering) — Phase 3's context-file scaffolding rides along with Phase 2's seed work to avoid rewriting templates twice. Stop after Phase 2 planning; do not start Phase 3 (PID liveness).
Resume sanity checks:
```powershell
cd C:\Users\Warren\claude_tasks\ctask
git checkout feat/v0.6-multi-agent-config
git log --oneline main..HEAD # expect 5 commits, tip 6182d89
just test # all 7 packages green
just build # ctask.exe builds locally
just build-linux # dist/ctask-linux-amd64 statically linked
```
## Load-bearing design points (don't forget)
### From v0.4 (unchanged)
- **Coexisting-session limitation:** "Continue anyway?" or `--force` → second session runs without its own lease. Documented in `docs/commands.md`. Don't redesign without a real user complaint.
- **`end_manifest` in the summary** is ctask-internal (not in spec example JSON) and powers Layer-3 stale-workspace diff. Removing it breaks Layer 3.
- **Write-lock skip classification** (best-effort vs important-but-non-fatal): unchanged.
- **`cmd/delete.go` two-check invariant:** unchanged. `CTASK_WORKSPACE` match → refuse; `.ctask/manifest-start.json` exists → refuse. Both before any mutation.
- **`session.Run()` lifecycle** in `internal/session/run.go`:
1. `PreflightFull` (Layers 3 + 1)
2. Write lock → write lease (unless coexisting)
3. Write lock → capture + write start manifest
4. Print launch-context banner (Layer 4)
5. Start heartbeat (only if we own the lease)
6. **v0.5: `workspace.ResolveLaunch(opts.WsDir, opts.LaunchDir)` — print warning or abort on security error**
7. Banner lines (including `project dir:` when LaunchDir set) + exec child with cwd = resolved launch path
8. Stop heartbeat
9. `handleProvisional` (gated on `NewlyCreated && childExitCode != 0 && emptyDiff`) — if it removes the workspace, skip finalize entirely
10. `finalize`: single write-lock acquire → append log + write summary + remove lease (if owned) + remove manifest-start
- **`new` is intentionally not given `--force`.** Brand-new workspaces have nothing for Layer 1/3 to warn about.
- **`internal/lockfile` is a neutral package** — no other ctask imports.
### From v0.4.1 (unchanged, still load-bearing)
- **`config.SearchRoots()` is the canonical way to enumerate workspace roots.** Always includes CTASK_ROOT. In v0.5 the semantics of the second entry expanded — see "From v0.5" below.
- **`QueryResult.Root`** is how callers render relative paths and compute `CTASK_ROOT` env var. Populated by `scanAllRoots`.
- **`scanWorkspaces` is a two-depth scan, first-match-wins.** Depth-1 (flat) check wins if present; never descends into a detected workspace.
- **Archive's non-TTY stdin refuses.** Fresh lease + non-TTY = exit non-zero without mutating. Don't regress to "silent proceed".
- **Doctor seed-dir checks are three-state.** Only "configured but missing" counts as a failure.
- **Provisional-cleanup exit-code gate.** `childExitCode == 0` means preserve. Don't special-case specific codes.
### From v0.5 (new — don't unlearn)
- **`launch_dir` is stored as workspace-relative in `task.yaml`**, empty for tasks and pre-v0.5 projects. Never store absolute paths. Never interpret `launch_dir` outside `workspace.ResolveLaunch`.
- **`workspace.ResolveLaunch` has three outcomes: valid, soft fallback (with warning), security/permission error.** Soft fallback is `(wsDir, warning, nil)` — caller warns and keeps launching. Error is `("", "", err)` — caller must abort. The asymmetry between `os.IsNotExist` (fallback) and other stat errors (propagate) is intentional; masking a permission error as a warning would silently strip launch-dir semantics.
- **Project subdir name = final suffixed slug.** `dup-2` collision means subdir is `dup-2/`, not `dup/`. The `actualSlug` variable in `workspace.Create` is the single source of truth.
- **Subdir is created after seeds, empty, never seeded.** Layer 1 (built-in defaults), Layer 2 (general seed), Layer 3 (project seed) all target the workspace root. The `if opts.IsProject { os.MkdirAll(projDir, 0755) }` block runs AFTER seed overlays and BEFORE `task.yaml` is written.
- **Session scope is workspace-wide even when launched in the subdir.** Lease, manifest capture, write lock, summary, stale-workspace diff all operate on `opts.WsDir` (the workspace root), not on the resolved launch path. Only the child process's cwd changes.
- **`CTASK_LAUNCH_DIR` is always exported** (empty string for tasks). Status line helpers and any future child-side integration can check `-n "$CTASK_LAUNCH_DIR"` safely.
- **`SearchRoots()` now appends `$CTASK_ROOT/projects/` by default** when `CTASK_PROJECT_ROOT` is unset. This is redundant with the v0.4.1 two-depth scan under `$CTASK_ROOT` but explicit per spec. Dedupe in `scanAllRoots` (`searchRootKey` — cleaned + lower-cased on Windows) prevents double-counting. Don't remove the default fallback without also reverting the spec-driven expectation that default projects are findable from any shell.
- **Doctor check for `CTASK_PROJECT_ROOT` is advisory, not prescriptive.** "Recommended: set at user scope so all terminals can discover these workspaces." Don't harden into a FAIL when the variable is set but the path exists.
### From v0.5.1 (new — don't unlearn)
- **Workspace directory prefix uses LOCAL time.** `time.Now()` in `workspace.Create` feeds the `YYYY-MM-DD` date and the `YYYYMMDD-HHMMSS` ID. Don't switch back to `.UTC()` for these. The `TestCreateDirectoryPrefixUsesLocalDate` regression test enforces this.
- **`ctask info` displays timestamps in local zone via `.Local().Format(...)`.** Stored timestamps in `task.yaml` are still UTC (`meta.CreatedAt = nowLocal.UTC().Truncate(time.Second)`) — only the display converts.
- **Stored timestamps everywhere else remain UTC.** Session logs, lease `StartedAt`/`LastHeartbeatAt`, manifest capture times, summary timestamps are all unambiguous UTC. Don't "localize" those — they're machine-readable.
- **Cross-builds force `CGO_ENABLED=0`.** `just build-linux` and `just build-windows` set this explicitly so the artifact is pure-Go static. Don't drop the flag — a native Linux build defaults to cgo and produces a glibc-linked binary that won't run in Alpine / distroless / scratch containers.
- **`WorkspacePath` is gone from `TaskMeta`.** Don't add it back. If a persistent workspace identifier is ever needed, add a properly relative-to-root `workspace_id` (forward-slash normalized). Old `task.yaml` files with `workspace_path` parse silently — the field is ignored on read.
- **POSIX install script does not modify shell config.** It warns the user about PATH but never edits `~/.bashrc` / `~/.zshrc`. Don't change this without an explicit user request.
### From v0.5.2 (new — don't unlearn)
- **`info` no longer has `--all`/`-a`.** Direct lookup is archived-inclusive by default. Don't add the flag back. The `Status:` line in info output makes archived state obvious. `TestInfoFindsArchivedWorkspaceWithoutFlag` enforces this.
- **`resume` / `archive` resolve archived-inclusive then filter.** Don't switch back to `includeArchived=false` at the resolver layer. The two-step pattern (resolve broadly, reject explicitly) is what lets `resume` give the actionable restore hint instead of a generic "not found".
- **Direct-lookup commands (`info`, `notes`, `path`, `restore`) use `includeArchived=true`.** Active-only commands (`resume`, `archive`) reject archived after resolve. Potentially-destructive commands (`delete`, `open`) keep their explicit `--all` opt-in. Don't drift back to a uniform default — the policy is intentional. See `v0.5.2-spec.md` "Workspace Lookup Policy".
- **`list --names` emits directory basenames, not bare slugs.** Bare slugs can collide (e.g., `promptvolley` archived in v1, active in v2). Basenames are unique under the resolver's exact-match step. `TestListNamesCandidatesResolveUniquely` enforces the invariant.
- **`ValidArgsFunction` hooks call `workspace.ListWorkspaces` directly.** No subprocess shell-out to `ctask list --names`. Don't add one — direct calls are faster and don't depend on PATH state.
- **Cobra adds the `completion` subcommand lazily on first `Execute()`.** A test that calls `rootCmd.Find("completion")` before any `Execute()` returns "unknown command". For unit tests, prefer the `rootCmd.GenXxxCompletion(...)` generators directly. For end-to-end, one `SetArgs(...)` + `Execute()` per test — running multiple `Execute()` calls in succession with different shell args has state issues.
- **`notes` uses `SilenceErrors: true`** so the `[ctask] no notes.md found in workspace "X"` stderr line is the only diagnostic the user/agent sees. Don't set `SilenceErrors: false` and add a `[ctask]` prefix to the returned error message — Cobra would then print both, doubling the message.
### From v0.5.3 (new — don't unlearn)
- **`CTASK_SESSION_MODE` is the only persistent-mode trigger.** No flag promotes a single command to persistent. `ctask attach` is the inverse — it always uses tmux regardless of env. Don't add a `--persistent` flag; the existing `direct` ↔ `persistent` ↔ `attach` triangle covers every use case.
- **tmux command construction lives in exactly one place per operation** — `internal/shell/tmux.go`. `AttachExisting` and `AdoptExistingPersistentSession` use shell primitives via test seams (`adoptAttacher`, `adoptPoll`, `attacher`); they do NOT hand-roll their own `exec.Command("tmux", ...)` calls. If you find a fresh `exec.Command("tmux", ...)` outside `internal/shell/tmux.go`, that's drift — fix it.
- **`session.Run` never calls `exec.LookPath("tmux")`.** The cmd-layer preflight (`cmd/persistent.go::preflightPersistentEntry`) is the single source of truth for tmux discovery; the validated path flows through `LaunchOpts.TmuxPath`. `Run` errors if `TmuxPath == ""` in persistent mode.
- **The persistent-mode dispatcher is `cmd/entry.go::dispatchPersistent(hasTmuxSession, leaseState)` — a pure function.** Three outcomes: `dispatchOwnerCreate`, `dispatchPassive`, `dispatchAdopted`. The cmd-layer `runWorkspaceEntry` is a package-level variable (test seam); per-command tests stub it to assert each entry command produces the right `WorkspaceEntryOptions`. Don't move the decision into the session package — it depends on cmd-layer prompts (fresh_remote confirmation, --direct bypass).
- **Session names are deterministic via `session.SessionName(category, slug, absWsPath)`.** Format: `ctask-<sanitized-category>-<sanitized-slug-truncated-30>-<sha256_6>`. On Windows the path is lowercased before hashing to match `searchRootKey`. Don't change the algorithm — name stability across runs is what makes passive reattach work without state. tmux's status bar truncates the name aggressively (e.g., `[ctask-pro0:bash*]`) — that's a tmux display thing, not a ctask bug.
- **`AdoptExistingPersistentSession` bumps `task.yaml.UpdatedAt` ONLY on successful adoption, not on the race-guard fall-through.** The `TestAdoptionBumpsUpdatedAtOnSuccess` and `TestAdoptionRaceGuardFallsThroughAndDoesNotBumpUpdatedAt` tests enforce both branches.
- **A fresh remote lease (`LeaseStateFreshRemote`) is NEVER silently overwritten.** `cmd/persistent.go::confirmFreshRemoteAdoption` prompts on TTY, refuses on non-TTY (with the remote hostname in the error). Don't drop the prompt or relax the non-TTY refusal.
- **`shouldRunProvisional(opts)` gates `handleProvisional` and is `false` in persistent mode.** The "user hit Esc → empty diff → reclaim workspace" UX assumption does not translate to tmux, where the polling loop typically reports clean exit even on abrupt session kills. The four-row table test `TestShouldRunProvisional` enforces this.
- **`finalize` stamps `EndReason` / `DetectedVia` / `SessionOwnership` based on `opts.SessionMode`** — direct: `child_exited` / `child_exit`; persistent owner-create: `tmux_session_ended` / `polling` / `created`; adopted: same plus `adopted` and `AdoptedFromOrphanAt`. These fields are `omitempty` so pre-v0.5.3 summaries continue to round-trip.
- **The tmux polling cadence is 3s (`shell.PollInterval`).** Below the 30s heartbeat interval so finalize lag is bounded; above 1s so exec overhead is negligible. Don't lower below 1s without measuring impact.
- **Native Windows refuses persistent mode with a WSL recommendation.** The check is `runtime.GOOS == "windows" && os.Getenv("WSL_DISTRO_NAME") == ""`. WSL sets `WSL_DISTRO_NAME` automatically, so WSL paths pass. Don't replace this with a `runtime.GOOS == "linux"` allowlist — that breaks macOS.
- **`ctask new` runs the persistent preflight BEFORE `workspace.Create`.** A missing tmux must not leave a half-initialized workspace on disk. The `cmd/new.go` ordering is load-bearing — don't move the preflight after creation.
- **The `[ctask] adopting orphaned persistent session...` line is the discriminator** between passive reattach and adoption in user-visible output. Don't suppress it; the manual smoke test relies on it.
### From v0.5.4 (new — don't unlearn)
- **`internal/session.SessionStatus(wsDir)` is display-only.** Pure read of `.ctask/session.json`. No tmux invocation, no PID liveness, no lock acquisition, no mutation of lease state. It must NOT be called from lifecycle or adoption code: the "missing `mode` field defaults to `direct`" rule and the malformed-lease-as-stale classification are display choices, not behavioral truths. Lifecycle code keeps using `ReadLease` / `IsFresh` / `InspectLease`. The status.go file calls this out at the function declaration — keep that comment.
- **Lease file is `.ctask/session.json` and the mode field is `mode`.** The v0.5.4 spec called these `lease.json` and `session_mode` respectively; the implementation correctly preserved the existing v0.4/v0.5.3 names per the spec's "no new metadata fields" constraint. Future specs touching this surface should use the actual names unless intentionally renaming the metadata.
- **`session.CurrentHostname()` is the exported wrapper around `currentHostname()`.** Use it in cmd-layer hostname comparisons (e.g., info's "omit hostname when local" rule) so the unknown-fallback semantics stay consistent with the rest of the package. Don't call `os.Hostname()` directly in cmd code.
- **`ctask info` Session block alignment is at column 14 across all rows.** Top-level `Session:` (8 chars + 6 spaces) and indented sub-rows (` Mode:` / ` Owner:` / ` Last owner:` / ` Attach:` / ` Note:`) all align values at column 14. Malformed leases render only `Session: stale` + ` Note: <diagnostic>` — no Mode/Owner/Attach rows because we can't trust values from a broken file.
- **`ctask info` Session block uses `invocationName()` for the Attach hint, NOT `session.SessionStatus`.** SessionStatus stays neutral — the hint string is built in `cmd/info.go::printSessionBlock`. Keep that boundary: the cmd layer owns invocation-name rendering; the session package owns lease parsing.
- **`ctask list` SESSION column is between STATUS and TYPE.** Order: status, session, type, mode, category, date, slug. No header (consistent with the existing list format). Archived workspaces ALWAYS show em dash regardless of any lease file present — display simplification, not a lifecycle invariant. `info` still surfaces the raw state for archived workspaces because info is the diagnostic command.
- **`ctask list --names` is unchanged in v0.5.4.** Bare basenames, no header, no session column, no whitespace per line, empty stdout on no match. `TestListNamesUnchangedHasNoSessionColumn` enforces this — if you touch the list rendering path, this test must keep passing.
- **`errArchivedWorkspace` is a sentinel, not a generic error.** `runResume` flips `cmd.SilenceErrors=true` only when the inner error is this exact sentinel. All other resume errors continue to flow through Cobra's default rendering. Don't generalize the sentinel into "any error we already printed" — the reason this works is the precise scoping. Test: `TestResumeArchivedHintNoDuplicateError` exercises the full Cobra `Execute()` path.
- **`formatResumeRestoreHint` and `formatDirectModeTmuxHint` are testable string-only helpers extracted purely so the audit can pin format strings without simulating tmux or stderr capture.** They have no production callers other than the original sites. Don't inline them back into their callers — the regression tests rely on calling them directly.
- **Invocation-name rule is codified per spec §2: command-form hints use `invocationName()`, product-identity references stay literal `"ctask"`.** Examples of literal-`"ctask"` (intentional): `[ctask]` log/error prefix, `"ctask persistent mode requires tmux"` (descriptive prose), the SSH-remote `ssh -t <host> ctask <subcmd>` hint (the remote runs `ctask`, not the user's local binary), and Cobra `Use:` / `Long:` strings. The two regression tests in `cmd/invocation_audit_test.go` pin `my-bin` (not `ctask`) for the resume restore hint and Layer-1 attach hint specifically to detect format-string regressions that would silently work under `withInvocationName(t, "ctask")`.
## Open follow-ups (deferred; not in any shipped v0.4v0.5.4 work)
### Potentially worth doing
- **Pre-v0.5 project workspaces have no `launch_dir`.** They launch from the workspace root, not from any project subdir. No migration path today. Acceptable — users can manually add a `launch_dir` to their `task.yaml` if they want the new behavior. Revisit only if someone complains.
- **Drop unused `slug` / `category` / `workspacePath` parameters from `seed.ClaudeMD`** (v0.3 follow-up, still open).
- **Status-line: color the `|project` / `|project:<dir>` marker** if Claude Code's `statusLine` ever supports ANSI.
### Concurrency-related (from v0.4)
- Coexisting-session detection (more than one live lease per workspace).
- Cross-machine PID liveness check.
- `--force` symmetry on other commands — no use case yet.
- A `ctask sessions` subcommand to inspect lease/summary.
### Repo hygiene
- Several untracked working docs (`v0.4-spec.md`, `v0.4.1-patch-spec.md`, `v0.5-spec.md`, `v0.5.3-spec.md`, `v0.5.4-spec.md`, `bugfix-provisional-workspace.md`, the implementation plans for v0.4 / v0.4.1 / v0.5 / v0.5.3, and the install-workflow plan) could be committed alongside `v0.2-spec.md`/`v0.3-spec.md` for durability. Currently session-local; per `notes.md`'s long-standing rule, leave alone unless explicitly asked.
- `.claude/settings.local.json` has uncommitted changes of unknown scope. Leave alone unless asked.
### Resolved (don't re-add to this list)
- ~~CTASK_PROJECT_ROOT env-var scoping UX footgun~~ → resolved in v0.5 via the default `$CTASK_ROOT/projects/` fallback in `SearchRoots()`.
- ~~UTC date in directory names / info display~~ → resolved in v0.5.1.
- ~~Duplicate Cobra `Error: workspace archived` line on `ctask resume <archived-ws>`~~ → resolved in v0.5.4 (`ae9bfaf`) via `errArchivedWorkspace` sentinel + conditional `SilenceErrors`.
- ~~`info` / `list` show no session state — users have to check lease files manually~~ → resolved in v0.5.4 (`e0e9cd7`, `0c8076a`) via Session block + SESSION column derived from new `internal/session.SessionStatus` helper.
- ~~`docs/commands.md` missing v0.5.2/v0.5.3/v0.5.4 commands and surfaces~~ → resolved in v0.5.4 (`4fd0bef`) via structured rewrite.
## Files to read first when resuming
For the v0.5.4 surface (just-shipped):
1. `v0.5.4-spec.md` — the spec v0.5.4 followed (note: spec mentions `lease.json` and `session_mode`; actual code uses `session.json` and `mode` — the implementation correctly preserved the existing names)
2. `internal/session/status.go` + `status_test.go` — `SessionStatus` display-only helper with the explicit no-tmux/no-PID/no-lock contract
3. `cmd/info.go::printSessionBlock` — Session block rendering with column-14 alignment + invocation-name Attach hint
4. `cmd/list.go::sessionColumn` — SESSION column with archived-as-em-dash rule
5. `cmd/resume.go` — `errArchivedWorkspace` sentinel + conditional `SilenceErrors`
6. `cmd/invocation_audit_test.go` — regression tests pinning a non-canonical name
7. `docs/commands.md` — rewritten v0.5.4 reference (Purpose / Usage / Scenarios / Examples / Flags / Notes / Related per command)
For the v0.5 surface:
8. `v0.5-spec.md` — the spec v0.5 followed
9. `docs/superpowers/plans/2026-04-22-v0.5-implementation.md` — the executed plan (includes scanner-safety regression tests, dedupe tests, amendment history)
10. `internal/workspace/launchdir.go` — `ResolveLaunch` with the three-outcome contract
11. `internal/workspace/create.go` — subdir scaffold + local-time date + `launch_dir` default
12. `internal/session/run.go` — `LaunchOpts.LaunchDir`, `ResolveLaunch` call site, banner extension
13. `cmd/info.go` — local-time display + launch fields (Session block sits between Path and these)
14. `cmd/doctor.go` — `checkProjectRoot` helper
15. `scripts/ctask-statusline.{sh,ps1}` — effective-path display logic
16. `internal/seed/templates.go` — `ClaudeMDProject` with Workspace Structure section
For the v0.4.1 surface (still load-bearing):
17. `internal/config/config.go` — `SearchRoots()`, `samePath`, `searchRootKey` dedup; default `$CTASK_ROOT/projects/` fallback
18. `internal/workspace/query.go` — two-depth `scanWorkspaces`, `scanAllRoots`, `QueryResult.Root`
19. `cmd/archive.go` — active-session check + non-TTY refusal + `isStdinTerminal`
For the v0.4 surface:
20. `internal/session/run_preflight.go` — Layer 3 + Layer 1 preflight
21. `internal/session/lease.go` — Lease + freshness + cleanup
22. `internal/session/summary.go` — SessionSummary + launch-context banner
23. `internal/lockfile/writelock.go` — write-lock primitive
24. `internal/session/run_provisional.go` — `handleProvisional` with `childExitCode` gate
25. `docs/commands.md` — user-facing surface (rewritten in v0.5.4 — see entry #7 above)
## Don't re-do
- Do not invent remote install / `go install` commands (per `CLAUDE.md`, this project is local-only)
- Do not touch `cmd/delete.go`'s two-check protection
- Do not weaken the v0.3 `.gitignore` seed-wins rule
- Do not redesign the lease model around multiple concurrent leases without a real user-reported problem
- Do not re-run the v0.4 smoke tests in a fresh session unless source has changed
- Do not expand the provisional-cleanup gate beyond "strictly empty manifest diff AND non-zero child exit". No size thresholds, no heuristics, no exit-code-specific mappings.
- Do not extend provisional cleanup to `resume` / `open` / `last`. `NewlyCreated` is set only by `cmd/new.go`.
- Do not drop `QueryResult.Root` or collapse `SearchRoots()` back to a single string.
- Do not change archive's non-TTY behavior back to "proceed silently".
- Do not add a workspace registry file. The default `$CTASK_ROOT/projects/` fallback solved the discovery footgun.
- **v0.5:** Do not change `launch_dir` storage to absolute paths. Workspace-relative is load-bearing.
- **v0.5:** Do not mask non-`os.IsNotExist` stat errors in `ResolveLaunch` as warning fallbacks. The asymmetry between soft-fallback (missing / not-a-dir) and hard-error (permission / ENOTDIR / invalid name) is deliberate.
- **v0.5:** Do not seed anything inside the project subdirectory. Seeds target the workspace root only.
- **v0.5:** Do not let the session launch change scope (lease, manifest, summary, write-lock) away from the workspace root. Only the child's cwd is the launch dir.
- **v0.5:** Do not remove the default `$CTASK_ROOT/projects/` fallback in `SearchRoots()` — it resolves the v0.4.1 env-var scoping footgun.
- **v0.5.1:** Do not switch the directory prefix / ID back to UTC. The `TestCreateDirectoryPrefixUsesLocalDate` test enforces local time.
- **v0.5.1:** Do not remove `.Local()` from the `ctask info` Created/Updated/Archived formatting. `TestInfoFormatsTimestampsInLocalZone` enforces local display.
- **v0.5.1:** Do not change *stored* timestamps (task.yaml, session logs, lease, manifest, summary) to local time. UTC storage is deliberate — only display converts.
- **v0.5.3:** Do not call `exec.Command("tmux", ...)` outside `internal/shell/tmux.go`. The single-construction-site rule is what makes passive reattach and adoption stay in sync. Test seams (`adoptAttacher`, `adoptPoll`, `attacher`) wrap the primitives — they don't replace them.
- **v0.5.3:** Do not move tmux discovery into `session.Run`. `cmd/persistent.go::preflightPersistentEntry` is the single source of truth; the validated path flows through `LaunchOpts.TmuxPath`.
- **v0.5.3:** Do not enable provisional cleanup in persistent mode. `shouldRunProvisional` returns false on `SessionMode == "persistent"` — the gate's UX assumption doesn't translate to tmux.
- **v0.5.3:** Do not silently overwrite a fresh remote lease. `confirmFreshRemoteAdoption` prompts on TTY and refuses on non-TTY. The non-TTY refusal carries the remote hostname so the user can disambiguate.
- **v0.5.3:** Do not run the persistent preflight after `workspace.Create` in `cmd/new.go`. Pre-create ordering prevents half-initialized workspaces when tmux is missing.
- **v0.5.3:** Do not change the `SessionName` algorithm. Name stability across processes is what makes passive reattach work without state. Windows path lowercasing matches `searchRootKey`.
- **v0.5.4:** Do not call `session.SessionStatus` from lifecycle or adoption code. It is display-only — the `mode`-defaults-to-`direct` rule and the malformed-as-stale classification are wrong for behavioral logic. Use `ReadLease`/`IsFresh`/`InspectLease` for lifecycle decisions.
- **v0.5.4:** Do not invoke tmux, check PID liveness, or acquire locks inside `SessionStatus` or its callers (`info` Session block, `list` SESSION column). PID liveness in particular is deferred to v0.6 Phase 2 where it has behavioral consequences (changing adoption thresholds) — building it display-only now would mean building it twice.
- **v0.5.4:** Do not add a session column or header to `ctask list --names` output. Machine-readable bare-basename-per-line is the contract. `TestListNamesUnchangedHasNoSessionColumn` enforces the invariant.
- **v0.5.4:** Do not collapse archived workspaces' SESSION column to anything other than the em dash in `list`. The display simplification is intentional. `info` is the diagnostic command — it still shows the raw lease state for archived workspaces if a lease file exists.
- **v0.5.4:** Do not generalize the `errArchivedWorkspace` sentinel into "any pre-printed error". The Cobra `SilenceErrors` flip is intentionally scoped to a single error path so unrelated resume errors keep getting Cobra's default rendering.
- **v0.5.4:** Do not move the Attach-hint string construction into `session.SessionStatus`. The cmd layer owns invocation-name rendering; the session package owns lease parsing. The boundary is what keeps SessionStatus testable without a `withInvocationName` seam.
- **v0.5.4:** Do not re-introduce a hardcoded `"ctask"` in command-form hints. Use `invocationName()`. The regression tests pin a non-canonical name specifically to catch this.