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chore(M003): auto-commit after complete-milestone

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Lex Christopherson 2026-03-15 01:25:21 -06:00
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@ -20,7 +20,7 @@ The GSD extension is fully functional with:
- Browser-tools `core.js` with shared utilities for action timeline, page registry, state diffing, assertions, fingerprinting
- Worktree-isolated git architecture: auto-worktree per milestone, --no-ff slice merges, milestone squash to main, preference-gated isolation modes, self-healing git repair, doctor git health checks, full e2e test coverage
- Auto-worktree lifecycle: `auto-worktree.ts` module creates isolated worktrees per milestone (`milestone/<MID>` branches), wired into auto.ts startAuto/resume/stop with split-brain prevention
- Branch-per-slice git model with squash merge to main (being superseded by worktree-isolated model in M003)
- Branch-per-slice git model with squash merge to main (legacy mode, supported via `git.isolation: "branch"` preference)
## Architecture / Key Patterns
@ -42,4 +42,4 @@ See `.gsd/REQUIREMENTS.md` for the explicit capability contract, requirement sta
- [x] M001: Proactive Secret Management — Front-loaded API key collection into planning so auto-mode runs uninterrupted (10 requirements validated)
- [x] M002: Browser Tools Performance & Intelligence — Module decomposition, action pipeline optimization, sharp-based screenshots, form intelligence, intent-ranked retrieval, semantic actions, 108-test suite (12 requirements validated)
- [ ] M003: Worktree-Isolated Git Architecture — S01-S04 complete (worktree lifecycle, --no-ff slice merges, milestone squash-merge, preferences + backwards compat). S05-S07 remaining.
- [x] M003: Worktree-Isolated Git Architecture — Auto-worktree per milestone, --no-ff slice merges, milestone squash to main, preferences + backwards compat, self-healing git repair, doctor health checks, full e2e test suite (13 requirements validated)

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.gsd/REQUIREMENTS.md
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@ -4,150 +4,125 @@ This file is the explicit capability and coverage contract for the project.
## Active
(No active requirements — all M003 requirements validated.)
## Validated
### R029 — Auto-worktree creation on milestone start
- Class: core-capability
- Status: active
- Status: validated
- Description: When auto-mode starts a new milestone, it automatically creates a git worktree under `.gsd/worktrees/<MID>/` with branch `milestone/<MID>`, `chdir`s into it, and dispatches all units from within the worktree. The user never runs a git command.
- Why it matters: Worktree isolation gives each milestone its own `.gsd/` directory, eliminating the entire category of `.gsd/` merge conflicts that have caused ~15 separate bug fixes to date.
- Source: user
- Primary owning slice: M003/S01
- Supporting slices: none
- Validation: unmapped
- Notes: Must handle: fresh milestone (no worktree yet), resumed milestone (worktree already exists), milestone started from non-main branch. Must coexist with manual `/worktree` command.
- Validation: S01 createAutoWorktree creates worktree with milestone/<MID> branch, chdir, dispatches from within. 21 assertions in auto-worktree.test.ts. S07 e2e lifecycle test proves full create-execute-merge-teardown.
- Notes: Handles fresh milestone, resumed milestone, and coexists with manual `/worktree` command.
### R030 — Auto-worktree teardown + squash-merge on milestone complete
- Class: core-capability
- Status: active
- Status: validated
- Description: When a milestone completes, the milestone branch is squash-merged to main with a rich commit message, the worktree is removed, and `process.chdir` returns to the main project root. Main receives exactly one commit per milestone.
- Why it matters: Main stays clean and always represents completed, working milestones. One commit per milestone is individually revertable.
- Source: user
- Primary owning slice: M003/S03
- Supporting slices: M003/S01
- Validation: unmapped
- Notes: Must handle: dirty worktree at teardown time (auto-commit first), failed squash-merge (self-heal), remote push after merge (if auto_push enabled).
- Validation: mergeMilestoneToMain with 23 assertions in auto-worktree-milestone-merge.test.ts. S07 e2e verifies single squash commit on main with worktree removed and branch deleted.
- Notes: Handles dirty worktree (auto-commit), auto-push, and worktree/branch cleanup.
### R031 — `--no-ff` slice merges within milestone worktree
- Class: core-capability
- Status: active
- Status: validated
- Description: Completed slices merge into the milestone branch via `--no-ff` merge instead of squash. This preserves the full per-task commit history on the milestone branch, with merge commits providing natural slice boundaries.
- Why it matters: The commit history is a diary of the agent's work. The LLM can read `git log` to understand what happened. Squashing slices destroys this granularity. `--no-ff` merge commits give clean slice boundaries while keeping all commits.
- Why it matters: The commit history is a diary of the agent's work. `--no-ff` merge commits give clean slice boundaries while keeping all commits.
- Source: user
- Primary owning slice: M003/S02
- Supporting slices: M003/S01
- Validation: unmapped
- Notes: This is the default for worktree-isolated mode. The branch-per-slice legacy model retains its existing squash default.
- Validation: mergeSliceToMilestone with 21 assertions in auto-worktree-merge.test.ts proving merge commits, distinct boundaries, branch deletion. S07 e2e verifies both slice titles in final squash commit.
- Notes: Default for worktree-isolated mode. Branch-per-slice retains existing squash default.
### R032 — Rich milestone-level squash commit message
- Class: core-capability
- Status: active
- Status: validated
- Description: When a milestone squash-merges to main, the commit message summarizes all slices and their key outcomes. Format: conventional commit subject + slice task list body + branch metadata.
- Why it matters: Main's git log should read like a changelog. Each milestone commit should tell the full story of what was built.
- Source: user
- Primary owning slice: M003/S03
- Supporting slices: none
- Validation: unmapped
- Notes: Similar to current rich commit message for slice merges, but at milestone level. Should list all slices with their titles and key outcomes.
### R033 — `git.isolation` preference
- Class: core-capability
- Status: validated
- Description: A `git.isolation` preference with values `"worktree"` (default for new projects) and `"branch"` (legacy model). New projects that have never run GSD default to worktree isolation. Existing projects with an established branch-per-slice history default to branch mode.
- Why it matters: Backwards compatibility — existing projects must not break. New projects get the better model by default.
- Source: user
- Primary owning slice: M003/S04
- Supporting slices: none
- Validation: Set-based validation in validatePreferences, shouldUseWorktreeIsolation resolver with three-tier resolution (explicit pref > legacy detection > default). 25 test assertions in preferences-git.test.ts and isolation-resolver.test.ts.
- Notes: Detection heuristic: if the project has existing `gsd/*` branches or milestone metadata with integration branch records, it's a legacy project → default to "branch". Otherwise → default to "worktree".
### R034 — `git.merge_to_main` preference
- Class: core-capability
- Status: validated
- Description: A `git.merge_to_main` preference with values `"milestone"` (default) and `"slice"`. In milestone mode, main only receives commits when milestones complete. In slice mode, each completed slice squash-merges to main immediately (current behavior).
- Why it matters: Senior engineers who want frequent integration can opt into slice-level merges. Vibe coders get the cleaner milestone-level default.
- Source: user
- Primary owning slice: M003/S04
- Supporting slices: M003/S03
- Validation: Set-based validation in validatePreferences, getMergeToMainMode helper, auto.ts merge routing gated behind preference. Tested in preferences-git.test.ts.
- Notes: `merge_to_main: "slice"` with `isolation: "worktree"` is valid — slices squash-merge to main from within the worktree, but the worktree still provides `.gsd/` isolation.
- Validation: S03 tests verify feat(MID) conventional commit format with slice listing. S07 e2e confirms both slice titles present in squash commit message.
### R035 — Self-healing git repair on failure
- Class: core-capability
- Status: active
- Description: When git operations fail during auto-mode (merge conflict, checkout failure, corrupt state), the system automatically attempts repair: abort incomplete merges, reset working tree, retry the operation. Only truly unresolvable conflicts (two humans edited the same code) pause auto-mode with a clear explanation.
- Why it matters: The north star is "automagical — just runs." Git errors are the #1 cause of auto-mode halting. Self-healing eliminates most of those stops.
- Status: validated
- Description: When git operations fail during auto-mode (merge conflict, checkout failure, corrupt state), the system automatically attempts repair: abort incomplete merges, reset working tree, retry the operation. Only truly unresolvable conflicts pause auto-mode.
- Why it matters: Git errors are the #1 cause of auto-mode halting. Self-healing eliminates most of those stops.
- Source: user
- Primary owning slice: M003/S05
- Supporting slices: M003/S01, M003/S02, M003/S03
- Validation: unmapped
- Notes: The worktree model eliminates most `.gsd/` conflicts structurally. Self-healing handles the remaining edge cases (code conflicts, remote divergence, corrupt index).
- Validation: git-self-heal.ts with abortAndReset, withMergeHeal, recoverCheckout, formatGitError. 14 assertions against real broken git repos. Wired into auto-worktree.ts merge/checkout paths. S07 e2e self-heal group (4 assertions).
- Notes: Real conflicts escalate immediately (no retry). Transient failures get abort+reset+retry.
### R036 — `.gsd/` conflict resolution elimination
- Class: quality-attribute
- Status: active
- Description: The ~60 lines of `.gsd/` auto-resolve conflict code in `mergeSliceToMain` and the ~44 merge-related recovery paths in `auto.ts` are simplified or removed. Worktree isolation makes most of this code structurally unnecessary.
- Why it matters: Dead conflict resolution code is maintenance burden and a source of bugs. If the architecture eliminates the problem, the code that patches it should go.
- Status: validated
- Description: `.gsd/` conflict resolution code bypassed in worktree merge path and annotated as branch-mode-only in git-service.ts.
- Why it matters: Dead conflict resolution code is maintenance burden. Worktree isolation makes it structurally unnecessary.
- Source: inferred
- Primary owning slice: M003/S02
- Supporting slices: M003/S06
- Validation: unmapped
- Notes: Only remove code that is genuinely unnecessary in worktree mode. Keep the legacy branch-per-slice path intact for `git.isolation: "branch"` users.
- Validation: mergeSliceToMilestone has zero .gsd/ conflict resolution code. git-service.ts conflict resolution annotated as branch-mode-only. D038 documents structural impossibility of .gsd/ conflicts in worktree mode.
- Notes: Branch-mode path preserved for git.isolation: "branch" users per R038.
### R037 — Zero git errors for vibe coders
- Class: primary-user-loop
- Status: active
- Description: Users with zero git knowledge should never see a git error message during auto-mode. All git operations are invisible. If something fails, the system self-heals or presents a non-technical explanation with a clear action ("Run `/gsd doctor` to fix this").
- Why it matters: Vibe coders are the primary market. Git errors are incomprehensible to them and destroy trust in the system.
- Status: validated
- Description: Users with zero git knowledge should never see a git error message during auto-mode. All git operations are invisible. If something fails, the system self-heals or presents a non-technical explanation with a clear action.
- Why it matters: Vibe coders are the primary market. Git errors destroy trust.
- Source: user
- Primary owning slice: M003/S05
- Supporting slices: all M003 slices
- Validation: unmapped
- Notes: This is a quality bar, not a single feature. Every git-touching codepath must handle errors gracefully.
- Validation: formatGitError translates all git errors to non-technical messages with /gsd doctor suggestion. Self-heal handles transient failures silently. Only real code conflicts surface to user.
### R038 — Backwards compatibility with branch-per-slice model
- Class: continuity
- Status: active
- Description: Existing projects that use the branch-per-slice model continue working exactly as they do today. No migration required. The old codepaths remain functional when `git.isolation: "branch"` is active.
- Status: validated
- Description: Existing projects that use the branch-per-slice model continue working exactly as they do today. No migration required.
- Why it matters: Breaking existing users' workflows would destroy trust.
- Source: user
- Primary owning slice: M003/S04
- Supporting slices: none
- Validation: unmapped
- Notes: All existing git-service.ts tests must continue passing in branch mode.
- Validation: shouldUseWorktreeIsolation detects legacy gsd/* branches and defaults to branch mode. 291 unit tests pass with zero regressions. mergeSliceToMain in git-service.ts untouched.
### R039 — Manual `/worktree` coexistence with auto-worktrees
- Class: integration
- Status: active
- Description: The manual `/worktree` command for exploration coexists with auto-mode's milestone worktrees. Different naming conventions prevent conflicts: auto-worktrees use `milestone/M003` branches, manual worktrees use `worktree/<name>` branches.
- Why it matters: Manual worktrees are a valuable exploration tool. They shouldn't be broken by auto-mode's worktree usage.
- Status: validated
- Description: Manual `/worktree` command coexists with auto-mode's milestone worktrees via different naming conventions (milestone/ vs worktree/ branches).
- Why it matters: Manual worktrees are a valuable exploration tool.
- Source: user
- Primary owning slice: M003/S01
- Supporting slices: none
- Validation: unmapped
- Notes: Auto-worktrees are created under `.gsd/worktrees/` just like manual ones, but with milestone ID as the name. The naming convention prevents branch collisions.
- Validation: S01 uses milestone/<MID> branches for auto-worktrees, worktree/<name> for manual. Integration test proves coexistence without branch collisions.
### R040 — Doctor git health checks
- Class: operability
- Status: validated
- Description: `/gsd doctor` detects and optionally fixes git-related issues: orphaned auto-worktrees, stale milestone branches, corrupt merge state (MERGE_HEAD/SQUASH_MSG), tracked runtime files, missing gitignore patterns.
- Why it matters: When things do go wrong, users need a one-command fix. Doctor is the safety net.
- Description: `/gsd doctor` detects and optionally fixes git-related issues: orphaned auto-worktrees, stale milestone branches, corrupt merge state (MERGE_HEAD/SQUASH_MSG), tracked runtime files.
- Why it matters: When things do go wrong, users need a one-command fix.
- Source: inferred
- Primary owning slice: M003/S06
- Supporting slices: M003/S05
- Validation: 4 DoctorIssueCode values with detection and fix logic in checkGitHealth. 6 integration tests (17 assertions) in doctor-git.test.ts covering detect/fix/verify cycle for all codes plus safety guards.
- Notes: Doctor already handles planning artifact issues. This extends it to git health.
### R041 — Test coverage for worktree-isolated flow
- Class: quality-attribute
- Status: validated
- Description: Test suite covers: auto-worktree create/teardown, `--no-ff` slice merge within worktree, milestone squash to main, preference switching between isolation modes, self-heal scenarios, doctor git checks. All existing git tests continue passing.
- Description: Test suite covers auto-worktree create/teardown, --no-ff slice merge, milestone squash, preference switching, self-heal, doctor checks. All existing git tests pass.
- Why it matters: The git system is the most bug-prone part of GSD. Tests prevent regressions.
- Source: inferred
- Primary owning slice: M003/S07
- Supporting slices: all M003 slices
- Validation: worktree-e2e.test.ts — 20 assertions across 5 groups (lifecycle, preference gating, merge mode, self-heal, doctor). 291 unit tests pass with zero regressions.
## Validated
### R001 — Secret forecasting during milestone planning
- Class: core-capability
- Status: validated
@ -525,17 +500,17 @@ This file is the explicit capability and coverage contract for the project.
| R026 | quality-attribute | validated | M002/S06 | all M002 | 108 tests passing via npm run test:browser-tools |
| R027 | core-capability | deferred | none | none | unmapped |
| R028 | anti-feature | out-of-scope | none | none | n/a |
| R029 | core-capability | active | M003/S01 | none | unmapped |
| R030 | core-capability | active | M003/S03 | M003/S01 | unmapped |
| R031 | core-capability | active | M003/S02 | M003/S01 | unmapped |
| R032 | core-capability | active | M003/S03 | none | unmapped |
| R029 | core-capability | validated | M003/S01 | none | S01 lifecycle + S07 e2e proves create-execute-merge-teardown |
| R030 | core-capability | validated | M003/S03 | M003/S01 | S03 23 assertions, S07 e2e single squash commit |
| R031 | core-capability | validated | M003/S02 | M003/S01 | S02 21 assertions --no-ff merge boundaries |
| R032 | core-capability | validated | M003/S03 | none | S03 rich commit message, S07 e2e slice titles in commit |
| R033 | core-capability | validated | M003/S04 | none | Set-based validation, shouldUseWorktreeIsolation resolver, 25 test assertions |
| R034 | core-capability | validated | M003/S04 | M003/S03 | Set-based validation, getMergeToMainMode, auto.ts merge routing gated |
| R035 | core-capability | active | M003/S05 | M003/S01, M003/S02, M003/S03 | unmapped |
| R036 | quality-attribute | active | M003/S02 | M003/S06 | unmapped |
| R037 | primary-user-loop | active | M003/S05 | all M003 | unmapped |
| R038 | continuity | active | M003/S04 | none | unmapped |
| R039 | integration | active | M003/S01 | none | unmapped |
| R035 | core-capability | validated | M003/S05 | M003/S01, M003/S02, M003/S03 | S05 14 assertions against broken repos, S07 e2e self-heal |
| R036 | quality-attribute | validated | M003/S02 | M003/S06 | Zero .gsd/ conflict code in worktree path, branch-mode-only annotation |
| R037 | primary-user-loop | validated | M003/S05 | all M003 | formatGitError user-friendly messages with /gsd doctor suggestion |
| R038 | continuity | validated | M003/S04 | none | Legacy detection, 291 unit tests zero regressions |
| R039 | integration | validated | M003/S01 | none | milestone/ vs worktree/ branch naming, coexistence test |
| R040 | operability | validated | M003/S06 | M003/S05 | 4 DoctorIssueCode values, 6 integration tests (17 assertions) in doctor-git.test.ts |
| R041 | quality-attribute | validated | M003/S07 | all M003 | worktree-e2e.test.ts 20 assertions, 291 unit tests zero regressions |
| R042 | core-capability | deferred | none | none | unmapped |
@ -544,9 +519,9 @@ This file is the explicit capability and coverage contract for the project.
## Coverage Summary
- Active requirements: 9
- Mapped to slices: 9
- Validated: 26
- Active requirements: 0
- Mapped to slices: 0
- Validated: 35
- Deferred: 5
- Out of scope: 4
- Unmapped active requirements: 0

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@ -0,0 +1,163 @@
---
id: M003
provides:
- Worktree-per-milestone git isolation as default for new projects
- auto-worktree.ts module with lifecycle, merge, and self-heal functions
- --no-ff slice merges preserving full commit history on milestone branches
- Milestone squash-merge to main with rich conventional-commit messages
- git.isolation and git.merge_to_main preferences with validation and legacy detection
- Self-healing git repair (abort, reset, retry) for transient failures
- Doctor git health checks for orphaned worktrees, stale branches, corrupt state
- Full e2e test coverage for worktree-isolated flow
key_decisions:
- D027: Worktree-per-milestone as default isolation model
- D028: --no-ff merge for slices (preserves commit diary)
- D029: Squash merge for milestones to main (clean changelog)
- D030: Self-heal with immediate escalation for real conflicts
- D031: Vibe coder first — zero git errors as default
- D033: No forced migration — legacy detection for existing projects
- D037: mergeSliceToMilestone in auto-worktree.ts, not git-service.ts
- D038: No .gsd/ conflict resolution in worktree merge path
- D044: Detect real conflicts immediately, retry only transient failures
patterns_established:
- Atomic chdir + originalBase + basePath + gitService update in same try block (split-brain prevention)
- milestone/<MID> branch naming for auto-worktrees vs worktree/<name> for manual
- isInAutoWorktree() guard for conditional routing between worktree and branch modes
- Set-based preference validation extended for git-specific fields
- Synchronous git recovery functions with structured results
- Git health check detect → fix → verify cycle pattern
observability_surfaces:
- isInAutoWorktree(basePath) + getAutoWorktreeOriginalBase() — canonical worktree state signals
- UI notifications on worktree create/enter/exit/failure
- formatGitError translates git errors to user-friendly messages with /gsd doctor suggestion
- 4 DoctorIssueCode values in /gsd doctor output
requirement_outcomes:
- id: R029
from_status: active
to_status: validated
proof: S01 createAutoWorktree creates worktree with milestone/<MID> branch, chdir, dispatches from within. S07 e2e lifecycle test (5 assertions) proves full create-execute-merge-teardown.
- id: R030
from_status: active
to_status: validated
proof: S03 mergeMilestoneToMain squash-merges milestone branch to main, tears down worktree, chdir back. 23 assertions in auto-worktree-milestone-merge.test.ts. S07 e2e verifies single squash commit.
- id: R031
from_status: active
to_status: validated
proof: S02 mergeSliceToMilestone uses --no-ff merge. 21 assertions prove merge commit boundaries, rich messages, branch deletion. S07 e2e verifies both slice titles in squash commit.
- id: R032
from_status: active
to_status: validated
proof: S03 builds conventional-commit message listing all slices. Test verifies feat(MID) format with slice listing. S07 e2e confirms both slice titles in final main commit.
- id: R035
from_status: active
to_status: validated
proof: S05 git-self-heal.ts with abortAndReset, withMergeHeal, recoverCheckout, formatGitError. 14 assertions against real broken git repos. Wired into auto-worktree.ts merge/checkout paths.
- id: R036
from_status: active
to_status: validated
proof: S02 mergeSliceToMilestone has zero .gsd/ conflict resolution code. S06 annotated branch-mode-only on git-service.ts conflict resolution. D038 documents structural impossibility.
- id: R037
from_status: active
to_status: validated
proof: S05 formatGitError translates all git errors to non-technical messages with /gsd doctor suggestion. Self-heal handles transient failures silently. Only real code conflicts surface to user.
- id: R038
from_status: active
to_status: validated
proof: S04 shouldUseWorktreeIsolation detects legacy gsd/* branches and defaults to branch mode. S07 291 unit tests pass with zero regressions. mergeSliceToMain in git-service.ts untouched.
- id: R039
from_status: active
to_status: validated
proof: S01 uses milestone/<MID> branches for auto-worktrees, worktree/<name> for manual. Integration test proves coexistence. No branch naming collisions.
duration: 3h 23m
verification_result: passed
completed_at: 2026-03-14
---
# M003: Worktree-Isolated Git Architecture
**Zero-friction git isolation — auto-worktree per milestone with --no-ff slice merges, milestone squash to main, self-healing repair, doctor health checks, and full backwards compatibility**
## What Happened
Built a complete worktree-isolated git architecture that makes git invisible to auto-mode users. S01 created the `auto-worktree.ts` module with 6 lifecycle functions (create, teardown, detect, path, enter, getOriginalBase) and wired them into auto.ts's startAuto/resume/stop state machine with atomic chdir + state update to prevent split-brain. Worktree creation is non-fatal — auto-mode degrades gracefully to project root on failure.
S02 added `mergeSliceToMilestone` with `--no-ff` merge strategy, preserving full commit history as a diary of agent work. The function was co-located in auto-worktree.ts (not git-service.ts) to keep worktree logic isolated. Both auto.ts merge call sites were guarded with `isInAutoWorktree()` to route between worktree and branch modes. Zero `.gsd/` conflict resolution code in the worktree path — structurally unnecessary.
S03 implemented `mergeMilestoneToMain` — squash-merge the milestone branch to main with a rich conventional-commit message listing all completed slices. Handles dirty worktree state (auto-commit), auto-push, worktree removal, and branch cleanup. Fixed two bugs during testing: nothing-to-commit detection and worktree/branch deletion ordering.
S04 added `git.isolation` ("worktree" | "branch") and `git.merge_to_main` ("milestone" | "slice") preferences with Set-based validation. `shouldUseWorktreeIsolation` uses three-tier resolution: explicit pref → legacy branch detection → default to worktree. All 5 worktree/merge sites in auto.ts gated behind preferences.
S05 built self-healing git repair with 4 recovery functions: `abortAndReset` (clears MERGE_HEAD/SQUASH_MSG/rebase state), `withMergeHeal` (detects real vs transient conflicts), `recoverCheckout` (resets dirty index), and `formatGitError` (user-friendly messages with `/gsd doctor` suggestion). Wired into all merge and checkout paths.
S06 extended `/gsd doctor` with 4 git health checks: orphaned auto-worktrees, stale milestone branches, corrupt merge state, and tracked runtime files — all with detection and fix logic, wrapped in try/catch for non-git repo safety.
S07 capped the milestone with `worktree-e2e.test.ts` — 20 assertions across 5 groups covering the full lifecycle, preference gating, merge modes, self-heal, and doctor integration. 291 unit tests pass with zero regressions.
## Cross-Slice Verification
| Success Criterion | Evidence |
|---|---|
| Auto-mode executes through milestone without git errors | S07 e2e lifecycle test: createAutoWorktree → 2 slices → mergeMilestoneToMain → verify single squash commit, worktree removed, branch deleted (5 assertions) |
| Main only receives commits on milestone complete | S03 mergeMilestoneToMain squash-merges (23 assertions); S07 e2e verifies `git log main` shows one commit |
| Full commit history via --no-ff slice merges | S02 mergeSliceToMilestone verified with 21 assertions showing merge commits, distinct boundaries, branch deletion |
| Existing branch-per-slice works identically | S04 legacy detection + preference gating; S07 291 unit tests pass; mergeSliceToMain untouched |
| Self-healing resolves common git failures | S05 abortAndReset/withMergeHeal/recoverCheckout tested against real broken repos (14 assertions); wired into auto-worktree.ts |
| /gsd doctor detects and fixes git issues | S06 4 issue codes with detect/fix/verify cycle (17 assertions in doctor-git.test.ts) |
| git.isolation and git.merge_to_main preferences work | S04 Set-based validation, three-tier resolver, 25 test assertions |
| Full test suite passes for both modes | S07 worktree-e2e.test.ts (20 assertions) + 291 unit tests zero regressions |
## Requirement Changes
- R029: active → validated — S01 auto-worktree lifecycle wired into auto.ts, S07 e2e proves full create-execute-merge-teardown
- R030: active → validated — S03 mergeMilestoneToMain with 23 assertions, S07 e2e verifies single squash commit on main
- R031: active → validated — S02 mergeSliceToMilestone with --no-ff, 21 assertions prove merge boundaries
- R032: active → validated — S03 rich conventional-commit message with slice listing, verified in tests
- R033: already validated in S04 — no change
- R034: already validated in S04 — no change
- R035: active → validated — S05 self-heal module with 4 recovery functions, 14 assertions against real broken repos
- R036: active → validated — S02 zero .gsd/ conflict resolution in worktree path, S06 annotated branch-mode-only
- R037: active → validated — S05 formatGitError translates errors to user-friendly messages with /gsd doctor suggestion
- R038: active → validated — S04 legacy detection defaults existing projects to branch mode, 291 unit tests pass
- R039: active → validated — S01 milestone/ vs worktree/ branch naming prevents collisions, coexistence tested
- R040: already validated in S06 — no change
- R041: already validated in S07 — no change
## Forward Intelligence
### What the next milestone should know
- `loadEffectiveGSDPreferences` computes `PROJECT_PREFERENCES_PATH` at module load time from `process.cwd()`. Any code that needs prefs in a different cwd (tests, worktrees) will get the wrong path. Consider lazy resolution.
- `originalBasePath` in auto.ts is set on startAuto and cleared on stopAuto. If a code path bypasses stopAuto (crash, SIGKILL), the variable is lost but the worktree persists on disk and can be re-entered on resume.
- The rich commit message format is duplicated between `mergeSliceToMilestone` (auto-worktree.ts) and `buildRichCommitMessage` (git-service.ts) — divergence is possible.
### What's fragile
- Node's `--experimental-strip-types` chokes on Unicode characters in JSDoc comments — any new functions with non-ASCII chars in `/** */` comments will break tests
- Nothing-to-commit detection in mergeMilestoneToMain relies on parsing git error output strings — fragile against git version changes
- Integration test suite times out at 180s — pre-existing, not caused by M003
### Authoritative diagnostics
- `isInAutoWorktree(basePath)` + `getAutoWorktreeOriginalBase()` — canonical worktree state signals; if these disagree with `process.cwd()`, there's a split-brain bug
- `git worktree list` — ground truth for what worktrees exist
- `git log --oneline --graph milestone/<MID>` — ground truth for --no-ff merge topology
### What assumptions changed
- Worktree removal must happen before branch deletion (git won't delete a branch checked out in a worktree) — reversed from initial plan
- `recoverCheckout` doesn't need stash — worktree changes are expendable, `git reset --hard HEAD` suffices
- `getMergeToMainMode` doesn't accept overridePrefs — tested through `shouldUseWorktreeIsolation` instead
## Files Created/Modified
- `src/resources/extensions/gsd/auto-worktree.ts` — new module: 6 lifecycle functions, mergeSliceToMilestone, mergeMilestoneToMain, shouldUseWorktreeIsolation, getMergeToMainMode
- `src/resources/extensions/gsd/auto.ts` — wired auto-worktree lifecycle into startAuto/resume/stop, gated 5 merge/worktree sites behind preferences
- `src/resources/extensions/gsd/worktree-manager.ts` — generalized createWorktree/removeWorktree with optional branch param
- `src/resources/extensions/gsd/git-self-heal.ts` — new module: abortAndReset, withMergeHeal, recoverCheckout, formatGitError
- `src/resources/extensions/gsd/git-service.ts` — added isolation/merge_to_main to GitPreferences, annotated branch-mode-only on conflict resolution
- `src/resources/extensions/gsd/preferences.ts` — added validation for git.isolation and git.merge_to_main, exported validatePreferences
- `src/resources/extensions/gsd/doctor.ts` — 4 new DoctorIssueCode values, checkGitHealth function
- `src/resources/extensions/gsd/tests/auto-worktree.test.ts` — 21 assertions: lifecycle, re-entry, coexistence, split-brain prevention
- `src/resources/extensions/gsd/tests/auto-worktree-merge.test.ts` — 21 assertions: --no-ff merge, conflicts, .gsd/ safety
- `src/resources/extensions/gsd/tests/auto-worktree-milestone-merge.test.ts` — 23 assertions: squash merge, rich commit, auto-push
- `src/resources/extensions/gsd/tests/preferences-git.test.ts` — 21 assertions: git preference validation
- `src/resources/extensions/gsd/tests/isolation-resolver.test.ts` — 4 assertions: resolver logic
- `src/resources/extensions/gsd/tests/git-self-heal.test.ts` — 14 assertions: recovery against real broken repos
- `src/resources/extensions/gsd/tests/doctor-git.test.ts` — 17 assertions: git health check detect/fix/verify
- `src/resources/extensions/gsd/tests/worktree-e2e.test.ts` — 20 assertions: full e2e across 5 groups