Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add kitchen-engineer42/joharnessburg --skill codex-template-activationgit clone --depth 1 https://github.com/kitchen-engineer42/joharnessburgWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/kitchen-engineer42/joharnessburg/codex-template-activation)<a href="https://agentmods.dev/skills/kitchen-engineer42/joharnessburg/codex-template-activation"><img src="https://agentmods.dev/badge/skills/kitchen-engineer42/joharnessburg/codex-template-activation.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00075 | $0.00355 |
| Opus 5 | $0.00037 | $0.00178 |
| Sonnet 5 | $0.00015 | $0.00071 |
| Haiku 4.5 | $0.00007 | $0.00036 |
Grade A, and why
codex-template-activation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Codex template activation
Keep Claude's apply.sh and claude --plugin-dir flow unchanged. Activate its
merged result for Codex through project-local state:
python3 "<john-plugin>/scripts/activate_codex_template.py" \
--merged-plugin "<applied-plugin-path>" \
--project-root "<user-project>"
Read the JSON response. Report the installed/skipped agent names and reproduce
every instruction exactly. The script materializes the plugin under
.john-codex/plugins/<template>/, merges .agents/plugins/marketplace.json,
and adds .john-codex/ to the repository-local Git exclude when possible.
The printed handoff verifies the installed listing, disables vanilla John for
this project, enables the applied listing, reviews and trusts its current hook
definition through /hooks, and restarts Codex. Treat all five as required;
installation alone neither enables the correct project state nor trusts hooks.
Do not edit a personal marketplace or global enablement automatically. Explain that applied John replaces vanilla John for this project session; enabling both creates duplicate hooks and ambiguous methodology.
Use --force only to rebuild a directory carrying John's activation marker.
The script rejects traversal, symlinks, and unmarked destinations, and restores
the prior activation and marketplace if publication fails.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 34 lines · 75 tokens per session scan A 2cf61eec8b77
codex-template-activation is a skill published in the GitHub repository kitchen-engineer42/joharnessburg (9 stars, last pushed 2mo ago), licensed MIT. It adds 75 tokens to every session and 355 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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