canonical/charm-tech is a shared repository that stores the common standards, decisions, specifications, style guides, and templates used across Canonical Charm Tech repositories. The Charm Tech team uses it as a central source so its repositories can reference or reuse the same documentation, Python and Go conventions, security policies, and CI configuration.
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 canonical/charm-tech --skill agents-mdgit clone --depth 1 https://github.com/canonical/charm-techWrote 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/canonical/charm-tech/agents-md)<a href="https://agentmods.dev/skills/canonical/charm-tech/agents-md"><img src="https://agentmods.dev/badge/skills/canonical/charm-tech/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/canonical/charm-tech/agents-md"><img src="https://agentmods.dev/badge/skills/canonical/charm-tech/agents-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00062 | $0.01044 |
| Opus 5.5 | $0.00025 | $0.00418 |
| Sonnet 5.5 | $0.00012 | $0.00209 |
| Haiku 4.5 | $0.00006 | $0.00104 |
Grade A, and why
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 1mo 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.
This is a copy
88% identical to agents-md — 19 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Maintaining AGENTS.md
AGENTS.md is the canonical agent-facing documentation. Keep it minimal—agents are capable and don't need hand-holding. Target under 60 lines; never exceed 100. Instruction-following quality degrades as document length increases.
File Setup
- Create
AGENTS.mdat project root - Create symlink:
ln -s AGENTS.md CLAUDE.md
Before Writing
Analyze the project to understand what belongs in the file:
- Package manager — Check for lock files (
pnpm-lock.yaml,yarn.lock,package-lock.json,uv.lock,poetry.lock) - Linter/formatter configs — Look for
.eslintrc,biome.json,ruff.toml,.prettierrc, etc. (don't duplicate these in AGENTS.md) - CI/build commands — Check
Makefile,package.jsonscripts, CI configs for canonical commands - Monorepo indicators — Check for
pnpm-workspace.yaml,nx.json, Cargo workspace, or subdirectorypackage.jsonfiles - Existing conventions — Check for existing CONTRIBUTING.md, docs/, or README patterns
Writing Rules
- Headers + bullets — No paragraphs
- Code blocks — For commands and templates
- Reference, don't embed — Point to existing docs: "See
CONTRIBUTING.mdfor setup" or "Follow patterns insrc/api/routes/" - No filler — No intros, conclusions, or pleasantries
- Trust capabilities — Omit obvious context
- Prefer file-scoped commands — Per-file test/lint/typecheck commands over project-wide builds
- Don't duplicate linters — Code style lives in linter configs, not AGENTS.md
Required Sections
Package Manager
Which tool and key commands only:
## Package Manager
Use **pnpm**: `pnpm install`, `pnpm dev`, `pnpm test`
File-Scoped Commands
Per-file commands are faster and cheaper than full project builds. Always include when available:
## File-Scoped Commands
| Task | Command |
|------|---------|
| Typecheck | `pnpm tsc --noEmit path/to/file.ts` |
| Lint | `pnpm eslint path/to/file.ts` |
| Test | `pnpm jest path/to/file.test.ts` |
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.
- 1mo ago First seen · 122 lines · 62 tokens per session scan A 79095aa8a8a9
agents-md is a skill published in the GitHub repository canonical/charm-tech (4 stars, last pushed 7d ago), licensed Apache-2.0. It adds 62 tokens to every session and 1,044 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 88% identical to agents-md, differing in 19 lines, and is treated as a copy.
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