# packages/coding-agent/scripts

Developer tooling for the coding-agent package: vendoring upstream extension packages, reload benchmarking, legacy session migration, and Native RPC QA. Shared QA environment, cleanup, model fixtures, and reporting live in `qa-shared/lib/`. Own file because this is a distinct tooling domain (score 13) with a shared vendoring seam into `src/core/extensions/builtin/`.

## STRUCTURE

```text
sync-builtin-extensions.mjs      Vendor pi-extensions packages into src/core/extensions/builtin
vendor-transform.mjs             Shared import-rewrite transform used by vendoring
bench-reload.mjs                 DefaultResourceLoader.reload() benchmark vs synthetic extensions
migrate-sessions.sh              Legacy one-off: ~/.pi/agent/*.jsonl -> session dirs (v0.30.0 bug)
qa-rpc-socket/                   Native RPC lifecycle and socket QA
qa-shared/lib/                  Shared QA helpers and behavior tests
```

## WHERE TO LOOK

| Task | First choice |
|---|---|
| Update a vendored builtin | `sync-builtin-extensions.mjs` + `vendor-transform.mjs` |
| Diagnose reload slowness | `bench-reload.mjs` (`--ext-count/--runs/--procs/--out`) |
| Run transport QA | `qa-rpc-socket/run.mjs` |

## CONVENTIONS

- Vendoring source root defaults to sibling `../pi-extensions`; override with `SENPI_BUILTIN_EXTENSIONS_SOURCE`.
- `DIR_SYNCS` lists packages whose senpi adaptation is fully captured by the mechanical transform (auto re-copy); `MANUAL_PACKAGES` lists diverged copies — upstream version recorded in `external-versions.json` only, behavior ported by hand.
- `vendor-transform.mjs` owns the rewrite rules (drop published `.js` suffixes, `@mariozechner`/`@earendil-works` scope mapping, depth-relative core imports, Theme exception). Only transforms expressible there belong in `DIR_SYNCS`.
- `bench-reload.mjs` always uses an isolated temporary agent dir and probes via `node --import tsx` (same jiti path as `test/resource-loader.test.ts`); never touches real `~/.senpi`.

## ANTI-PATTERNS

- Re-copying a `MANUAL_PACKAGES` builtin — it clobbers hand-maintained divergence.
- Hand-editing vendored builtin trees instead of going through the sync script + transform.
- Running `bench-reload.mjs` against the real agent directory.

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Parent: `packages/coding-agent/AGENTS.md`.