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/agentis-tools/ctx/claude-mdgit clone --depth 1 https://github.com/agentis-tools/ctxWhat 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 | $0.00315 | $0.00315 |
| Opus 5 | $0.00158 | $0.00158 |
| Sonnet 5 | $0.00063 | $0.00063 |
| Haiku 4.5 | $0.00032 | $0.00032 |
Grade C, and why
ctx CLAUDE.md scanned grade C with 1 finding 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- governance-instructions:v1 --> What it actually says
Claude operating instructions for ctx
Follow AGENTS.md as the root contributor contract. Read
governance/agent-workflow.md before editing
and governance/versioning.md before touching any
compatibility or release surface. docs/ is public product documentation;
internal instructions and maintainer policy belong only under governance/.
ctx-assisted development
Prefer the repository index for code intelligence, then verify against source:
ctx map --budget 2000ctx query find <name>/ctx search <query>ctx source <symbol>/ctx explain <symbol>ctx similar <symbol>before adding an implementationctx checkandctx score --against <base>before handoff
Do not edit generated .claude/hooks/ctx/, .codex/ harness files, plugin
manifests, release notes, lockfile versions, or CLI contract snapshots by hand.
Use their repository scripts. Never bypass a compatibility/version/security
gate or describe a human-review rule as automatically enforced.
Project tracking
Work is tracked in Linear under team agentis (AGE), project ctx:
https://linear.app/itkonsult/project/ctx-7625ddcc6dcb. New repository issues
belong to that team/project when issue creation is explicitly requested.
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 · 31 lines · 315 tokens per session scan C 48ff17134bdd
ctx CLAUDE.md is an instructions file published in the GitHub repository agentis-tools/ctx (11 stars, last pushed 15d ago), licensed Apache-2.0. It adds 315 tokens to every session, about $0.0016 per session on Opus 5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
har AGENTS.md
Instructions for os-factory/har, covering har — agent development guide, har / agent environment, harnesses in this repo, harness workflow (dogfooding) and run history.
har CLAUDE.md
Instructions for os-factory/har, a project described as: HAR: open agent harness (CLI + MCP) for coding agents. Isolated worktrees, deterministic verify, software factory workflows for Claude Code, Cursor, and Codex.
alego AGENTS.md
Instructions for singula-ai/alego, covering agents.md, pre-release stance: foundation over blast radius, repository layout, commands and host sandbox failures.
alego CLAUDE.md
Instructions for singula-ai/alego, a project described as: Build AI Agents like playing LEGOs. Everything is a Plugin.
aif-handoff CLAUDE.md
Instructions for lee-to/aif-handoff, covering claude.md, project overview, tech stack, project structure and key entry points.
sprawling CLAUDE.md
Instructions for 2youg1/sprawling: See AGENTS.md. It is the whole instruction set for this repository — the loop, what to read first, the five steps of one change, the rules a machine holds, and the language and commit conventions.