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

Gave the operator the immediate workaround (File → Open Folder in the EDH).
Reopened #8 + comment; claimed 0009; branch fix/edh-sandbox-workspace.
Added committed sandbox/playground.md (guided playground); launch.json EDH args now open ${workspaceFolder}/sandbox; sandbox/.threads/ gitignored; README F5 step updated.
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.

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