# Session 0059.0 — Transcript

> App: vscode-cowriting-plugin
> Start: 2026-06-26T06-01 (PST)
> End: 2026-06-26T08-32 (PST)
> Type: planning-and-executing
> Posture: autonomous (yolo)
> Status: **FINALIZED**

## Launch prompt

Plan-and-execute #64 (F12 inline editable proposed-change diff in the Markdown
editor) from the graduated spec `specs/coauthoring-inline-editor-diff.md`, in
isolated worktree `vscode-cowriting-plugin-s58` (branch `s58-inline-editor-diff`),
opened straight off brainstorming session 0058.

## Plan

Implement #64 per spec: optimistic-apply the proposed change into the editor
buffer (editable, tinted insertions + struck-red deletion hints), accept =
finalize-in-place / reject = revert-in-place, `Accept ▾`/`Reject ▾` (+ Accept-all
/Reject-all) from both editor (CodeLens+QuickPick) and webview. Reverses
INV-10/INV-32; INV-48..54. Implementation plan:
`docs/superpowers/plans/2026-06-26-inline-editor-diff.md`.

## Outcome — SHIPPED

#64 (F12) **shipped to main** — PR #66 squash `7b98249`, issue auto-closed.
Worktree built, subagent-driven (fresh implementer per task + two-stage review),
adversarial final review, then merged through the concurrent #65 landing.

## Turn-by-turn arc

1. **Init** — claimed session 0059 (0057 still in-flight; isolated worktree made
   it §5.4-safe). Synced worktree, `npm ci`, green baseline (242 unit).
2. **Plan** — read the whole subsystem (proposalController, trackChangesModel,
   attributionController, trackChangesPreview, preview.ts/css, extension.ts,
   package.json, E2E harness); wrote an 8-task TDD plan. Surfaced a **spec
   refinement**: optimistic apply must re-anchor the proposal to the applied text
   + store `Proposal.original` (F4's `fp.text` is the original, gone once applied).
3. **Execute (subagent-driven, sonnet implementers):**
   - T1 `Proposal.original` (model) — `bea9fd5`.
   - T2 `setProposalApplied` re-anchor helper — `92ff4dd`.
   - T3 seam `landBaseline` opt + `signalLanded` — `6d54963`. **Surfaced the
     host-E2E was blocked by a macOS UNIX-socket-length `EINVAL`** (the long
     worktree path). Fixed by pinning `--user-data-dir` to a short `/tmp` path
     (`930b4ab`) → host-E2E now launches from a worktree.
   - T4 `optimisticApply`/`finalizeInPlace`/`revertInPlace`/`rejectAll` —
     `ddbbb7a` (subagent caught a real `keyOf` vs `uri.toString()` test bug).
   - T5 `EditorProposalController` + pure `decorationPlan` — `8c6e782`+`e599284`
     (subagent added a setTimeout(0) apply-debounce for the batch race; updated 5
     existing E2E for the INV-10 reversal — verified legitimate, not weakened).
   - T6 render-once INV-50 reconciliation — `6529332`; I added a coloring-
     alignment fix (`landedSpans` via `toLanded`) the subagent's note flagged —
     `3805323`.
   - T7 webview `Accept ▾`/`Reject ▾` + dropdown + `rejectAllProposals` — `f4594da`.
4. **Adversarial final review (opus subagent)** — found a **CRITICAL** (revert
   target clobbered on save+reload, in-memory `applied` empty post-reload) and a
   MINOR (toolbar summary double-counts). Both fixed + a reload-safety regression
   E2E — `6560894`. Verdict invariants INV-48..54 upheld; decorationPlan alignment
   verified correct.
5. **Concurrency** — session 0057 had merged **#65** (unify Ask-Claude on a
   split-below webview; removed `InlineAskController`) to main mid-session. Merged
   origin/main into the branch, resolved the one `extension.ts` conflict (drop
   inlineAsk, keep `EditorProposalController`); suite green; squash-merged PR #66.
6. **Hygiene** — a `git add -A` during the merge accidentally tracked the spec
   copy in the code repo; removed it (PR #67 `844a278`) — specs are canonical in
   the content repo. Plan archived (`8c14f54`); spec patched to **v0.1.1** with the
   re-anchor refinement and submitted (`43913dc`).

## Cut state

- **main @ `844a278`** (clean, pushed). #64 closed.
- Tests: **249 unit + 87/5 host-E2E green**, typecheck clean.
- Content repo: spec v0.1.1 (`43913dc`) + plan (`8c14f54`).
- Worktree removed.

## Deferred decisions

- **Re-anchor on optimistic apply (spec refinement, RESOLVED into v0.1.1).** Added
  `Proposal.original` + re-fingerprint to the applied text; captured once →
  reload-safe. Folded into the spec.
- **`finalizeInPlace` has no orphan re-resolve guard** (CodeLens Accept), unlike
  the webview `acceptById`. Intentional — spec §2.2 says Accept keeps the human's
  in-place edits (which would orphan the exact-text fp) — but it's asymmetric. Left
  as-is; noted as a follow-up nit.
- **Per-proposal webview carets always show Accept-all/Reject-all** even at 1
  pending (the toolbar button correctly hides <2). Cosmetic; not fixed.

## Not done

- **Manual smoke (interactive F5)** — the live editor diff, CodeLens dropdown,
  both-surface parity, and save-while-pending need an Extension Development Host
  run (operator-side). No flotilla/PPE for this app — the PR-merge to main is the
  ship.

## Next-session prompt

```
/goal Manually smoke-test #64 (F12 inline editor diff) in an Extension Development Host (F5) — verify the live editable diff + deletion hints, the Accept ▾/Reject ▾ CodeLens dropdown, editor↔webview parity, and save-while-pending — then start the next backlog item; #59 (P1, macOS Apple-Events prompt, likely @cline/sdk) is highest priority
```