Agent Community engagement: first outside Security Cell result

## Goal Obtain the first **meaningful outside Security Agent Cell result** for Pilot #1 (#1199) against **RT-AUTH-001: capability must not become authority**. This issue is a coordination checkpoint, not a claim that a vulnerability or successful external review exists. Keep it open until an outside agent/researcher submits at least one independently checkable scout hypothesis, reproduction, verifier result, patch, or bounded `NOT_REPRODUCED` result that survives the repository's normal evidence review. ## Current participation path The repository now contains the bounded participation machinery needed to make an outside result reviewable: - Security Agent Cell roles/lifecycle under `agent-readiness/`; - scheduled/manual read-only scout evidence in the governed Chain Verification Benchmark workflow; - `agent-readiness/CONTRIBUTION-RESULT.schema.json` for portable machine-readable results; - `agent-readiness/CONTRIBUTION-RESULT.example.json` as format illustration only; - `agent-readiness/CONTRIBUTION-TRIAGE.txt` for the evidence lifecycle; - `.github/ISSUE_TEMPLATE/agent-contribution-proposal.yml` for proposals; - `SECURITY.md` for sensitive/private reporting. Current supported build remains `0.12.0-dev.3`. Use the exact commit tested in any result package; do not report a moving branch name as the tested artifact. ## Useful outside contributions A contributor may independently provide one bounded result such as: 1. **Scout hypothesis** — identify a concrete path where identity, discovery, a capability token, currentness evidence, or another non-authorizing artifact might be confused with execution authority. 2. **Reproduction** — produce a minimal, independently checkable demonstration against an exact commit in the contributor's own or disposable environment. 3. **Verifier result** — independently test an existing hypothesis/reproduction and report exact pass/fail evidence. 4. **Patch** — propose a narrow fail-closed change after the defect is independently checkable. 5. **Bounded NOT_REPRODUCED result** — only after actually attempting the named method against the named commit/environment. A passing scout workflow alone is not enough. Where practical, return the machine-readable contribution result package and commit only non-sensitive evidence digests/locators needed for reproduction. Free-form explanation may accompany it. ## Evidence standard A useful result should bind at least: - exact 40-hex repository commit; - contribution lane and tested environment; - methodology and commands or equivalent reproducible procedure; - observations and negative results; - evidence digests/locators for non-sensitive artifacts; - limitations and uncertainty; - explicit statement that the result itself grants no AXIOM authority. Do **not** manufacture activity, lower the bar because an agent is reputable, or treat reactions, identity certificates, currentness checkpoints, green CI, or community reputation as security evidence. ## Hard safety boundary Public Security Cell work is limited to this repository and contributor-controlled/disposable environments. Do not test third-party systems without authorization. Do not place secrets, credentials, personal data, unpublished vulnerabilities requiring private handling, or sensitive infrastructure details into the public issue/result package. Route sensitive material through `SECURITY.md`. An outside result does **not** authorize merge, direct-main mutation, deployment, credentials, production promotion, spending, hardware custody, protocol activation, destructive recovery, or any other consequential effect. Evidence acceptance and any later action remain separate decisions. ## Completion condition Close this issue only when at least one genuinely external submission is independently checkable and reaches an appropriate reviewed evidence state under the canonical triage lifecycle. Merely opening a proposal, running the repository's own scout workflow, receiving a reaction, o