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 agentmods add instructions/outlinedriven/odin-codex-plugin/agents-mdgit clone --depth 1 https://github.com/OutlineDriven/odin-codex-pluginWhat 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 | $0.10608 | $0.10608 |
| Opus 5 | $0.05304 | $0.05304 |
| Sonnet 5 | $0.02122 | $0.02122 |
| Haiku 4.5 | $0.01061 | $0.01061 |
Grade A, and why
odin-codex-plugin AGENTS.md 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 390 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Codex Coding Agent Adherences
Method: principle-first minimalism (delete > edit > add), data-first design, plan-before-change, ask-with-evidence, delegate intentionally, verify continuously, scope discipline, simplicity bias, workspace hygiene (.outline/, /tmp).
Language [MANDATORY—HARD ENFORCEMENT]: ALWAYS think, reason, act, and respond in English regardless of user's language. Translate ALL non-English inputs to English BEFORE reasoning or acting. No exceptions — internal reasoning, code comments, commit messages, documentation, agent communication, tool output interpretation: ALL must be English. May write multilingual docs ONLY when explicitly and specifically requested by the user. Violation = CRITICAL FAILURE; formal-logic reasoning uses ASCII operators only — connectives ! & | ^ -> <->, quantifiers forall exists exists!, turnstiles |- |=, relations = != < > <= >= = :=, set ops in notin subset subseteq union intersect \ empty, type/lambda \x. : :: |-> -> <:, proof/inference => :. s.t. iff QED induction, modal/temporal [] <> G F X U R W A E | — not Unicode glyphs; source code syntax, identifiers, and locale-specific strings follow the task's target language — code comments, non-locale documentation, and commit messages remain English unless multilingual docs are explicitly requested.
<verbalized_sampling> Sample multiple intent hypotheses, weight each (0–1), and name the falsifier per hypothesis. Scale depth to ambiguity/risk; broaden until edge cases stop changing the decision. Synthesize surviving hypotheses into one direction. Output: intent summary, assumptions, focused questions. No non-trivial change without visible VS. </verbalized_sampling>
<tool_selection>
Tool Selection Matrix: ast-grep → code structure/refactoring/bulk transforms | srgn → grammar-scoped regex replacement | ripgrep → text/comments/strings/non-code | awk → column extraction/line ranges/text regex | tokei → scope assessment | Combined → multi-stage via fd/rg/xargs pipelines
Scope (tokei-driven): Run tokei <target> --output json | jq '.Total.code' before editing. Micro (<500 LOC): Direct edit/single-file focus/minimal verification | Small (500-2K LOC): Progressive refinement/2-3 file scope/standard verification | Medium (2K-10K LOC): Multi-agent parallel/dependency mapping/staged rollout | Large (10K-50K LOC): Research-first/architecture review/incremental checkpoints | Massive (>50K LOC): Decompose to subsystems/formal planning/multi-phase execution
</tool_selection>
Query Language (Revsets):
- Draft/Stack:
draft()|stack()|branches() - Author/Message:
author.name("Alice")|message("fix bug") - Paths:
paths.changed("src/*.rs") - Relations:
ancestors(<rev>)|descendants(<rev>)|children(<rev>)|parents(<rev>) - Operations:
<set1> | <set2>(union) |<set1> & <set2>(intersection) |<set1> - <set2>(difference) |<set1> % <set2>(only) - Tests:
tests.passed()|tests.failed("<cmd>") - Shortcuts:
:<rev>(ancestors) |<rev>:(descendants) - Usage:
git query '<revset>'|git smartlog '<revset>'|git sync '<revset>'
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.
- 2d ago First seen · 390 lines · 10,608 tokens per session scan A fd6ec20ef703
odin-codex-plugin AGENTS.md is an instructions file published in the GitHub repository OutlineDriven/odin-codex-plugin (15 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 10,608 tokens to every session, about $0.0530 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.
Other instructions, from other repositories
apm cli.instructions.md
CLI Design Guidelines for visual output, styling, and user experience standards.
apm integrators.instructions.md
Architecture rules for file-level integrators (BaseIntegrator pattern).
apm architecture.instructions.md
Single canonical owner discipline: one authority per durable decision, guarded by a regression test + a static boundary check.
apm cicd.instructions.md
CI/CD Pipeline configuration for PyInstaller binary packaging and release workflow.
apm encoding.instructions.md
Cross-platform encoding rules — keep all source and CLI output within printable ASCII.
apm changelog.instructions.md
Changelog format and conventions based on Keep a Changelog.