Wires `scripts/skill-probe-i0.sh` — the deterministic lexical trigger
ranker (`scan_descriptions.py --probe`, ag-7led) — as an
**I0-INFORMATIONAL** step inside the `skill-eval` job.
## What it does
- Runs the probe over every `trigger_probes:` phrase in the corpus,
writes a per-skill JSON receipt to `.agents/ao/skill-eval/<id>.json`,
and uploads it as the `skill-retrieval-probe-receipts` workflow
artifact.
- Asserts byte-stable **determinism** across two runs; a
non-deterministic probe is surfaced as a `::warning::` only.
- **Not a PR check:** `continue-on-error: true` lives INSIDE the
existing `skill-eval` job, so no new GitHub check is created and the
step can never block (or even advisory-fail) a merge. I0 =
informational.
- No-ops cleanly (exit 0, no receipts) until a skill opts in with
`trigger_probes:`.
## Acceptance
- Probe emits the JSON-receipt artifact AND no new PR check appears
(verify absent from `gh pr checks`).
- A deliberately non-deterministic probe input is caught by the
determinism assertion before it could become a gate —
`tests/scripts/skill-probe-i0.bats` (3 specs, all green).
## 2-week stability baseline
Documented in three places (validate.yml comment,
`docs/contracts/ci-jobs.yaml` skill-eval entry,
`skills/skill-builder/SKILL.md` trigger_probes note): keep `--probe`
I0-only until the receipt lane runs green + byte-stable across the
corpus for a 2-week baseline of merges before any blocking-gate
promotion.
Closes-scenario: ag-iyu4#probe-i0
Bounded-context: BC1-Corpus
Evidence: scripts/skill-probe-i0.sh
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