Ben Stull
87 lines
3.8 KiB
Markdown
87 lines
3.8 KiB
Markdown
# Session 0047.0 — Transcript
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> App: vscode-cowriting-plugin
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> Start: 2026-06-13T08-34 (PST)
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> Type: planning-and-executing
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> End: 2026-06-13T08-44 (PST)
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> Status: **FINALIZED.**
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> Posture: autonomous (yolo)
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## Launch prompt
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```
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/goal plan-and-execute #33 (intra-emphasis sentinel hardening — token-aware fix for the 2 characterized failure modes)
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```
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## Plan
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**#33 (task, P3)** — harden the F9/F10 author-coloring PUA sentinels against
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intra-emphasis markdown. Anchor: leaf `task` → §4.3 R2 (no design gate). Picked
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autonomously (next clean plan-and-executable backlog item; doesn't touch the
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content repo). Approach = the token-aware fix recommended in the issue #33 comment.
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Two characterized failure modes (issue #33 comment, session 0032):
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- **CASE1** — a span boundary lands strictly inside a delimiter run (`a**b**c`,
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boundary between the two `*`): the injected sentinel splits `**` → markdown parse
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breaks (stray `<em></em>`, raw `**` left).
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- **CASE3** — a span boundary inside an emphasis run (`**bold**`, span covers
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`**bo`): emphasis renders but the author `<span>` and `<strong>` **misnest**
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(`<strong>bo</span>ld</strong>`).
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Fix (both needed):
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1. `injectSentinels` — **clamp** any sentinel offset that lands strictly inside a
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markdown delimiter run (`* _ ~ \``) to the run's start, so a sentinel never
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splits a delimiter (fixes CASE1). Skip now-zero-width spans.
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2. `sentinelsToSpans` — replace the naive split/join with a **token-aware walker**
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over the rendered HTML: emit `cw-by-*` spans only around TEXT runs, closing the
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span before any `<tag>` and reopening after, so a span never crosses an element
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boundary (fixes CASE3 — one span segment per text run). Strip any stray sentinel
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left inside a tag (no PUA leakage).
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Pure/vscode-free/deterministic (INV-33). Non-goals: link/attribute sentinel cases,
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visual language, attribution model.
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Tasks: unit tests reproducing CASE1 + CASE3 (+ regression on existing
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colorByAuthor/renderReview cases) → implement clamp + walker → green; spec already
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notes the hardening (§1.7/§9). No deploy pipeline (extension).
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## Results
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**#33 (task, P3) shipped to `main`** — PR
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[#53](https://git.benstull.org/benstull/vscode-cowriting-plugin/pulls/53)
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(merged), issue #33 closed. Picked autonomously (next clean plan-and-executable
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leaf; doesn't touch the content repo).
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- `trackChangesModel.ts` `injectSentinels` — clamp any sentinel offset landing
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strictly inside a delimiter run (`* _ ~ \``) to the run's start (fixes CASE1
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parse-break); drop spans that clamp to empty.
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- `trackChangesModel.ts` `sentinelsToSpans` — token-aware walker emitting the
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`cw-by-*` span only around text runs, split at every `<tag>` boundary (fixes
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CASE3 misnest); strays stripped (no PUA leak).
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- 4 new unit tests (CASE1/CASE3/CASE2-regression/no-leak), real markdown-it via
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`renderReview`.
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Verification: `tsc --noEmit` clean; **222 unit** green; **74/5 host E2E** green;
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the F10/authorship E2E (`cw-by-claude`/`cw-by-human`) still pass (common case
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byte-identical).
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## Session arc
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1. Stop hook required autonomously determining/executing the next milestone;
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chose #33 (leaf task, no content-repo dependency). Claimed 0047, clean `main`.
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2. Read issue #33 + its investigation comment (2 failure modes, recommended
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token-aware approach) + session 0032 characterization + the sentinel code.
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3. TDD: CASE1/CASE3 reproduced red → implemented clamp + walker → green; full
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suite + E2E green; self-reviewed (one pure module).
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4. Shipped (PR #53), closed #33.
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## Deferred decisions
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_Autonomous-mode low-confidence calls the driver made and would have
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liked operator input on. Empty if none._
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- _No low-confidence calls this session._ (Approach was the one recommended in the
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issue #33 comment; the fix is a pure-module robustness change with full test
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coverage and no regression.)
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