context

Synthesize a prose context primer from past sessions on this repo. ## Steps 1. **Fetch the primer.** Call the `get_context_primer` MCP tool (pass `cwd` if a path was given). 2. **Synthesize, don't dump.** From the JSON, write: prior decisions, what was tried/abandoned, and the current open thread. 3. **Anchor the open thread** on the most-recent session's `closing` — `closing.user` is the last thing you actually typed and `closing.assistant` is the assistant's last substantive reply (outcomes like "PR is up: …" survive); `branch` is the branch you left off on. 4. **Drill into a session worth expanding.** If one primer session needs more than its opening/closing (an ambiguous open thread, a decision you need the details of), get its full arc from `get_session_digest`: resolve the session's `filePath` via `search_sessions` (a distinctive phrase from its `intent` plus the repo as `project`), then digest that path. Expand a specific exchange with `get_session_messages(offset: exchanges[].index)` — don't page from 0. 5. **Keep it tight** — a short brief the user can act on, not a transcript. ## Guidelines - Prefer the most recent + most-edited files as the likely active surface. - If the primer is empty, say so plainly; don't invent history.