ITT-196 review_followup source-of-truth를 .github에 패키징

.gitignore

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+__pycache__/
+*.pyc

README.md

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 사람마다 근육량이 다르듯 집중력도 다르겠지만, 집중해서 무엇이든 해보겠다는 자세를 가지길 바라고 있어요.
 
 > Carpe diem!
+
+## Shared Tooling
+
+- Hermes PR review gate source-of-truth: [`tools/review_followup/README.md`](tools/review_followup/README.md)

tools/review_followup/README.md

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+# Review Follow-up Tooling
+
+`tools/review_followup/` is the public source-of-truth for the Hermes PR review gate.
+
+## Boundary
+
+- Edit and review changes in this directory only.
+- `~/.hermes/workspace/tools/` is a generated runtime copy, not the origin.
+- Do not commit secrets, private issue/comment dumps, personal workspace paths, or operational logs here.
+
+## Contents
+
+- `review_followup.py`: Multica/GitHub review gate CLI.
+- `reviewer_roster.example.json`: public example roster for runtime bootstrap.
+- `reviewer_roster.schema.json`: JSON schema for roster validation.
+- `review_followup_runbook.md`: operator runbook template.
+- `review_followup_webhook_prompt.txt`: webhook prompt template.
+- `sync_runtime_copy.py`: installs or refreshes the runtime copy.
+- `tests/`: repo-local regression tests.
+
+## Sync Runtime Copy
+
+```bash
+python3 tools/review_followup/sync_runtime_copy.py
+```
+
+Useful flags:
+
+- `--runtime-dir /path/to/tools`
+- `--fallback-project-title ittae`
+- `--overwrite-roster`
+- `--dry-run`
+- `--output json`
+
+The sync step renders template placeholders into runtime paths and initializes `reviewer_roster.json` only when it does not already exist, unless `--overwrite-roster` is passed.
+
+## Test
+
+```bash
+python3 -m unittest \
+  tools/review_followup/tests/test_review_followup.py \
+  tools/review_followup/tests/test_review_followup_runtime.py
+```