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8ebf71ec25
## Why Environment skill discovery already asks the executor to run one `fs/walk`. That response contains every regular file path found under the selected root, including any `agents/openai.yaml` files. Today Core keeps the discovered `SKILL.md` paths but discards the rest of that file inventory. It then sends one `fs/getMetadata` request per skill just to ask whether `agents/openai.yaml` exists. A root with 66 skills and no metadata therefore pays for 66 unnecessary network round trips. ## What changes - Keep the `fs/walk` file and directory inventory for the duration of the scan. - Associate each discovered `SKILL.md` with metadata that is known present, known absent, or still requires a fallback probe. - Read a known `agents/openai.yaml` directly instead of statting it first. - Skip the metadata request entirely when a complete walk shows that the skill has no `agents` directory. - Read a known `SKILL.md` and `agents/openai.yaml` concurrently. - Keep parsing and validation in `core-skills`. The inventory is scan-local. This does not add another cache or change cache lifetime. ## Network impact For a complete scan of 66 valid skills with no `agents/openai.yaml`, and one root `.codex-plugin/plugin.json`: | Operation | Current | After this PR | | --- | ---: | ---: | | `fs/walk` | 1 | 1 | | Read `SKILL.md` | 66 | 66 | | Stat `agents/openai.yaml` | 66 | 0 | | Read `agents/openai.yaml` | 0 | 0 | | Stat plugin manifest | 1 | 1 | | Read plugin manifest | 1 | 1 | | **Total executor RPCs** | **135** | **69** | This removes exactly 66 request/response exchanges from the common cold scan. Warm scans remain at zero discovery RPCs because the thread-level executor catalog cache is unchanged. When metadata exists, each file still requires one read. This PR removes only the preceding existence check; it does not batch file contents into a new RPC. ## Correctness fallbacks Absence is trusted only when the walk is complete and the metadata directory was not present. Core keeps the existing `getMetadata` fallback when: - the walk was truncated; - the walk reported an error; or - an `agents` directory was observed but `openai.yaml` was not, which preserves support for file symlinks and traversal boundaries. ## Deliberate scope This PR changes only the environment skill loader and its existing filesystem-call regression coverage. It does not: - change `fs/walk` or any exec-server protocol; - add `readFiles` or a skills-list endpoint; - change thread caching; - change local skill discovery; - change exec-server request concurrency; or - optimize plugin-manifest lookup. The plugin-manifest stat is intentionally left in place, which is why this PR reaches 69 calls rather than the broader 68-call estimate. That lookup has separate alternate-path, ancestor, and symlink semantics and should not be mixed into this change.
8ebf71ec25
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2026-06-26 01:47:00 +01:00
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