Session 0018.0 — Transcript

App: vscode-cowriting-plugin Start: 2026-06-11T07-03 (PST) End: 2026-06-11T07-24 (PST) Type: planning-and-executing Status: FINALIZED

Launch prompt

/goal Plan and execute Feature #17 (F6 diff-view toggle) from the graduated Solution Design at content specs/coauthoring-diff-view.md — 4 slices per §7.2, host-E2E tier, no LLM in CI

Outcome

F6 diff-view toggle (Feature #17) shipped to main via PR #18. Planned and executed in one session from the graduated Solution Design vscode-cowriting-plugin-content/specs/coauthoring-diff-view.md, across its four slices (§7.2). Issue #17 closed. Implementation plan archived to the content repo plans/.

Plan

Implementation plan: docs/superpowers/plans/2026-06-11-f6-diff-view-toggle.md (written via superpowers:writing-plans, 9 tasks across the spec's 4 slices):

SLICE-1 Task 1 — BaselineStore (vscode-free) + vitest unit suite.
SLICE-2 Task 2 — additive onDidApplyAgentEdit seam event (INV-9/18); Task 3 — DiffViewController content provider + baseline lifecycle (ensure/advance/pin), storage-unavailable fallback.
SLICE-3 Task 4 — toggle UX via tab groups; Task 5 — wire into extension.ts; Task 6 — package.json commands + ctrl+alt+d.
SLICE-4 Task 7 — host E2E suite (no LLM, programmatic seam ingress); Task 8 — no-folder stub regression; Task 9 — manual smoke + README.

Pre-state

Branch main, clean, on origin/main (the claim's placeholder push for 0018 was fast-forwarded in before work began).
Epic #1 inner-loop ladder F2–F5 shipped (PRs #5/#7/#13/#15). F6 spec graduated in session 0017. No other sessions in flight (peek confirmed).

Turn-by-turn arc

Session gate + init. Classified the opening /goal as planning-and-executing; ran wgl-planning-and-executing. Computed PST start 2026-06-11T07-03, peeked (no in-flight), claimed session 0018 (atomic push). Verified clean pushed main baseline (synced the placeholder commit), confirmed the @~/.claude/wiggleverse.md stub present, resolved content + roadmap repos.
Grounding. Read the F6 spec end-to-end + the existing code it builds on: store.ts (CoauthorStore pattern), attributionController.ts seam (applyAgentEdit ~:232), extension.ts activation/renderIfOpen, package.json contributions, the E2E harness (runTest.ts, suite/index.ts, proposals.test.ts), store.test.ts, the no-workspace test, README tail.
Plan. Wrote the 9-task plan via superpowers:writing-plans; self-reviewed against the spec (full slice coverage, no placeholders, type consistency); cleaned a confusing isDiffOpen presentation in Task 4.
Execution (inline, branch f6-diff-view-toggle, one commit per task):
- T1: BaselineStore + 5 vitest tests (TDD: red → green).
- T2: onDidApplyAgentEdit emitter, fired after a real seam apply. Typecheck + 103 unit + 18+3 E2E stayed green (no listener yet).
- T3: DiffViewController (provider + ensure/advance/pin + fallback + test surface), toggle stub.
- T4: real toggle via tab groups (vscode.diff, findDiffTab, epochLabel, isDiffOpen).
- T5: wired into extension.ts (store from context.storageUri, advance subscribed to the seam event, ensureBaseline in renderIfOpen, API field, no-folder stubs).
- T6: package.json two commands + ctrl+alt+d.
- T7: host E2E suite + fixture. First run 26 pass / 1 fail — the "toggle closes → normal editor back" assertion introspected activeTab input type, transiently undefined right after tabGroups.close. Loosened it to assert activeTextEditor is the file (behavior-true). Re-run: 27 pass.
- T8: added the two F6 commands to the no-workspace stub regression. 27+3 green.
- T9: docs/MANUAL-SMOKE-F6.md + README F6 section. Full gate: typecheck clean, 103 unit, 27+3 E2E (exit 0).
Operator interjection (mid-T3): "I saw errors in the bottom-right during those E2E tests." Investigated the run's exthost logs — zero [error] lines; only two benign built-in [vscode.git] config-access warnings (not ours, not toasts). Explained the corner toasts are the expected yellow warning-path assertions the suites deliberately trigger (stale-proposal, no-folder stubs, untracked); the only red showErrorMessage sites (showClineSdkInfo, live-turn editSelection) don't run in E2E.
Ship. Pushed branch, created PR #18 via the Gitea API (mergeable), merged to main, synced local, deleted the branch. Commented + closed issue #17.
Finalize. Archived the plan to content plans/ (commit 805fd80), updated memory, drafted the next /goal, published this transcript.

Cut state

main clean and synced; PR #18 merged; branch deleted.
Issue #17 closed. Epic #1 (umbrella) remains open — only open issue.
Plan archived: vscode-cowriting-plugin-content/plans/2026-06-11-f6-diff-view-toggle.md.
Verification: typecheck clean · 103 unit · 27 + 3 host E2E (exit 0). No LLM in CI.
Not done (intentional): live manual smoke (docs/MANUAL-SMOKE-F6.md) — an operator GUI gesture, not runnable in-session.

Deferred decisions

Autonomous-mode low-confidence calls surfaced at finalize.

From the spec (§9), carried into the plan as-specced: absorb-on-advance semantics (vs. baseline splicing) and the ctrl+alt+d default keybinding — both decided in brainstorming (0017) without operator input. Both cheap to revisit; splicing is a documented additive follow-up.
This session: loosened one E2E assertion ("toggle closes → normal editor back") from activeTab input-type introspection to activeTextEditor identity, because activeTab is transiently undefined right after tabGroups.close. The loosened form still proves the behavior (diff closed + file is the active editor). Low risk.

Next-session prompt

/goal Capture the next vscode-cowriting-plugin feature(s) — F6 spec §9 deferred follow-ups (baseline splicing, named/selectable baselines, changed-line gutter indicators, cross-rung baseline sharing) — and/or assess closing Epic #1 now its F2–F6 ladder has shipped.

Read first: memory/f6-diff-view-shipped.md. There is no ROADMAP.md and no open leaf issue — Epic #1 is the only open tracker item and its planned F2–F6 ladder is fully shipped, so the next move is genuinely a capture/triage decision, not a queued build.

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