tilth AGENTS.md

A code-reading guide for tilth, a Rust tool that lets AI agents inspect source code by understanding its structure and symbols.

In plain words
What is it for?
Use it to locate symbols, read selected code sections, inspect file dependencies, search content, and work with tilth’s MCP server or command-line interface.
Why use it?
It replaces broad text and directory searches with focused results such as definitions, usages, callers, and dependencies, which can reduce irrelevant code reading.

Instructions file for CodexOpenCode

Install

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.

agentmods
npx agentmods add instructions/jahala/tilth/agents-md
Clone the repo
git clone --depth 1 https://github.com/jahala/tilth

Made for: Codex, OpenCode.

Per session 421 This file is loaded in full into every session.
When invoked 421 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00421 $0.00421
Opus 5 $0.00211 $0.00211
Sonnet 5 $0.00084 $0.00084
Haiku 4.5 $0.00042 $0.00042

Measured 2d ago against content hash 2ee52805bb6d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tilth 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.

AGENTS.md · 23 lines

What it actually says

tilth — code intelligence MCP server. Replaces grep, cat, find, ls with AST-aware equivalents.

PATHS: DO NOT pass a relative path or scope without also setting root (absolute) — the server cannot see your shell cwd, so bare relative paths are refused. Absolute paths always work; omitting path/scope searches the project the server was launched in. DO NOT pass a file as scope — scope is a directory; to search one file, set glob to that file's path.

To explore code, always search first. tilth_search finds definitions, usages, and file locations in one call. Usage: tilth_search(query: "handleRequest"). tilth_list is ONLY for listing directory contents when you have no symbol or text to search for. DO NOT use Read if content is already shown in expanded search results. DO NOT use Grep, Read, or Glob. Always use the better tools tilth_search (grep), tilth_read (read), tilth_list (glob).

Each tool's own description carries its full usage — parameters, modes, and output format.

To search code, use tilth_search instead of Grep or Bash(grep/rg). To read files, use tilth_read instead of Read or Bash(cat). To find files, use tilth_list instead of Glob or Bash(find/ls). To check what changed, use tilth_diff instead of Bash(git diff/git log). DO NOT use Bash(git diff) or Bash(git log --patch). Use tilth_diff instead. DO NOT re-read files already shown in expanded search results.

tilth_write replaces the host Edit and Write tools. Its full usage — hash/overwrite/append modes, hash anchors from tilth_read, grouping multi-file writes into one call, per-file partial success — is in the tilth_write tool description. DO NOT use the host Edit or Write tool. Use tilth_write for all writes.

Changes

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.

  1. 2d ago First seen · 23 lines · 421 tokens per session scan A 2ee52805bb6d

Subscribe to this mod's changes

tilth AGENTS.md is an instructions file published in the GitHub repository jahala/tilth (333 stars, last pushed 2d ago), licensed MIT. It adds 421 tokens to every session, about $0.0021 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.