# Session 0009.0 — Transcript

> App: vscode-cowriting-plugin
> Start: 2026-06-10T14-30 (PST) · End: 2026-06-10T14-32 (PST)
> Type: planning-and-executing
> Driver: Claude (Opus 4.8), autonomous posture · Operator: Ben Stull
> Continuation context: same conversation as sessions 0007/0008; opened when
> the operator's retest of the #8 fix hit the stub warning.

## Launch prompt

```
Follow-up fix for #8: F5 EDH still folderless because launch.json points it at the repo folder already open in the dev window (VS Code one-folder-one-window). Point the EDH at a committed sandbox/ playground subfolder instead; update README.
```

(Operator's report: pressed F5 after PR #10 and got "Cowriting: open a folder
first" — the new stub, proving the #8 guard works, but the EDH was still
folderless.)

## Anchor (§3.4)

Issue **#8** reopened with a diagnosis comment — PR #10's `launch.json` half
pointed the EDH at `${workspaceFolder}` (the repo), which the dev window
already has open; VS Code won't open one folder in two windows, so plain F5
still landed folderless.

## Arc

1. Gave the operator the immediate workaround (File → Open Folder in the EDH).
2. Reopened #8 + comment; claimed 0009; branch `fix/edh-sandbox-workspace`.
3. Added committed `sandbox/playground.md` (guided playground);
   `launch.json` EDH args now open `${workspaceFolder}/sandbox`;
   `sandbox/.threads/` gitignored; README F5 step updated.
4. Gate: typecheck clean · vitest 69/69 · build OK (config/docs-only — no
   product code, E2E unaffected). Commit `cdf2221`; **PR #11** merged
   (`4ee2f70`); #8 auto-closed; branch deleted.

No plan artifact (trivial-fix skip case). Pipeline (§9): localhost gates
green; non-shippable extension POC, nothing deploys.

## Deferred decisions

No low-confidence calls — single, operator-diagnosed defect with one obvious
fix shape (the standard extension-sample sandbox pattern).

## Cut state

- `main` = `origin/main` = `4ee2f70`; tree clean; no open PRs; open issues:
  Epic #1 only. Operator F5 retest of the sandbox flow pending.

## Operator plate

- Retest: F5 from the dev window → EDH opens `sandbox/` →
  `playground.md` → type / right-click → Cowriting menus.

## Next-session prompt

```
/goal Capture Feature F4 (propose/accept on the applyAgentEdit seam, per coauthoring-inner-loop.md §9 OPEN→F4 and coauthoring-attribution.md §9) as a typed issue under Epic #1 on benstull/vscode-cowriting-plugin, then brainstorm its Solution Design spec in a follow-up session.
```