Document canonical `/run-tests` deployment

Link Tractor's project reference to the immutable canonical skill
and its repository, then show the exact hybrid deployment command.

Also clarify the Prompt-IO record's commit boundaries and PR #510
review direction.

Review: PR #510 (copilot-pull-request-reviewer)
https://github.com/goodboy/tractor/pull/510#pullrequestreview-5046306236

Prompt-IO: ai/prompt-io/opencode/20260822T022526Z_5562fd9a_prompt_io.md

(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))

.claude/skills/run-tests/test-harness-reference.md

@@ -1,8 +1,20 @@
 # Tractor Test Harness Reference
 
-This repository-local file supplements the canonical `/run-tests` skill.
+This repository-local file supplements the canonical [`/run-tests` skill][1]
+from the [`ai.skillz` repository][2]. Its deployer links the shared `SKILL.md`
+into both
+`.claude/skills/run-tests/` and `.opencode/skills/run-tests/` while preserving
+this project-owned reference:
+
+```text
+bash /path/to/ai.skillz/scripts/deploy.sh run-tests /path/to/tractor --provider all --method symlink
+```
+
 Keep shared environment permission, process-signal safety, target selection,
-failure inspection, and result reporting policy in the canonical `SKILL.md`.
+failure inspection, and result reporting policy in the deployed `SKILL.md`.
+
+[1]: https://github.com/baudco/ai.skillz/blob/2d4896ca7e38fe2cb3090cdefc7245be4241a6d2/skills/run-tests/SKILL.md
+[2]: https://github.com/baudco/ai.skillz
 
 ## Project And Environment
 

ai/prompt-io/opencode/20260822T022526Z_5562fd9a_prompt_io.md

@@ -22,13 +22,16 @@ Audited all local branches, worktrees, affected-path history, deployment
 state, canonical skill dependencies, and current Tractor harness behavior.
 Corrected the local test reference where it overstated cleanup safety or
 omitted current environment, platform, debugger, timeout, and CI details.
-Narrowed `.gitignore` to the three managed `run-tests` deployment blocks.
+Narrowed the correction commit to three managed `run-tests` deployment
+blocks. A later dedicated commit records the complete generated `ai.skillz`
+deployment state.
 
 ## Files changed
 
 - `.claude/skills/run-tests/test-harness-reference.md` - correct the
   project-specific test and cleanup contract.
-- `.gitignore` - remove unrelated deployment ignores from this migration.
+- `.gitignore` - narrow the correction commit before the later dedicated
+  deployment-state expansion.
 - `ai/prompt-io/opencode/20260822T022526Z_5562fd9a_prompt_io.md` - record
   the migration review provenance.
 - `ai/prompt-io/opencode/20260822T022526Z_5562fd9a_prompt_io.raw.md` -
@@ -41,4 +44,6 @@ was discovered, approved correcting the landing branch during PR #481
 review, and directed removal or reconciliation of unrelated ignore rules.
 During PR #510 review, the human required the stackscope and shared-memory
 safety clarifications and immutable provenance pointers before landing. No
-direct source-line edits were made by the human.
+direct source-line edits were made by the human. Copilot review then prompted
+the human to require explicit canonical deployment instructions and clarify
+the later `.gitignore` expansion.