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 oodaris/autocodex --skill eng-plugin-authoringgit clone --depth 1 https://github.com/oodaris/autocodexWrote 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/oodaris/autocodex/eng-plugin-authoring)<a href="https://agentmods.dev/skills/oodaris/autocodex/eng-plugin-authoring"><img src="https://agentmods.dev/badge/skills/oodaris/autocodex/eng-plugin-authoring.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 | $0.00018 | $0.00252 |
| Opus 5 | $0.00009 | $0.00126 |
| Sonnet 5 | $0.00004 | $0.00050 |
| Haiku 4.5 | $0.00002 | $0.00025 |
Grade A, and why
eng-plugin-authoring 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
Plugin Authoring
Repo anchors (autocodex)
- PLUGINS_PATH:
plugins/ - DOCS_PATH:
docs/plugins/README.md
When to use
- Creating or updating an autocodex plugin.
Preconditions
- You know the capability inputs/outputs.
Inputs to confirm
- Capability name and schemas
- Transport (jsonrpc for v1)
Required artifacts
plugin.yamlmanifest- Executable plugin binary/script
- Example invocation
Quick path
- Write manifest.
- Implement handshake and JSON-RPC loop.
- Add a sample invocation.
Steps
- Define capability input/output schema.
- Implement handshake and request loop.
- Add usage docs.
Failure modes and responses
- Handshake missing: plugin will fail to load.
- Capability mismatch: host rejects the request.
Definition of done
- Plugin loads and responds to a capability call.
Example (minimal)
- Capability:
summarizewith{text:string}input.
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 · 47 lines · 18 tokens per session scan A 53945e9426cf
eng-plugin-authoring is a skill published in the GitHub repository oodaris/autocodex (16 stars, last pushed 6mo ago), licensed MIT. It adds 18 tokens to every session and 252 once invoked, about $0.0001 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 2026-08-30.
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