Borrowing it
Nothing to install: this file belongs to clouatre-labs/aptu-coder. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/clouatre-labs/aptu-coder/main/.github/instructions/src-languages.instructions.mdgit clone --depth 1 https://github.com/clouatre-labs/aptu-coderWrote 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/instructions/clouatre-labs/aptu-coder/src-languages)<a href="https://agentmods.dev/instructions/clouatre-labs/aptu-coder/src-languages"><img src="https://agentmods.dev/badge/instructions/clouatre-labs/aptu-coder/src-languages/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/instructions/clouatre-labs/aptu-coder/src-languages"><img src="https://agentmods.dev/badge/instructions/clouatre-labs/aptu-coder/src-languages.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 | $0.00447 | $0.00447 |
| Opus 5.5 | $0.00179 | $0.00179 |
| Sonnet 5.5 | $0.00089 | $0.00089 |
| Haiku 4.5 | $0.00045 | $0.00045 |
Grade A, and why
aptu-coder src-languages.instructions.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.
What it actually says
LanguageInfo registration
New language handlers must register all fields in src/languages/mod.rs get_language_info(). Flag a new language file in src/languages/ that is not matched by a new arm in the get_language_info match block.
Flag a new language extension that is not added to the map in src/lang.rs.
tree-sitter query strings
- Queries must use named captures (
@func_name,@call,@import_path). Flag positional-only captures. IMPL_TRAIT_QUERYmust only match(type_identifier)for the trait name -- scoped traits (impl io::Sink for T) are intentionally out of scope. Flag attempts to extend it toscoped_type_identifier.
Handler function signatures
All four handler function types must match the type aliases in src/languages/mod.rs:
ExtractFunctionNameHandler:fn(&Node, &str, &str) -> Option<String>FindMethodForReceiverHandler:fn(&Node, &str, Option<usize>) -> Option<String>FindReceiverTypeHandler:fn(&Node, &str) -> Option<String>ExtractInheritanceHandler:fn(&Node, &str) -> Vec<String>
Flag handler functions with signatures that deviate from these types.
Optional fields
reference_query, import_query, impl_query, impl_trait_query are Option<&'static str>. Use None for languages that do not support the concept. Flag Some("") (empty string) as a substitute for None.
Kotlin-specific notes
Kotlin registers two extensions: .kt (source) and .kts (script). Both map to the same LanguageInfo entry. When writing Kotlin tree-sitter queries, note that .kts files may contain top-level expressions that .kt source files do not; queries should not assume a class or object wrapper is always present.
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 · 36 lines · 447 tokens per session scan A 43c29ba5bd86
aptu-coder src-languages.instructions.md is an instructions file published in the GitHub repository clouatre-labs/aptu-coder (6 stars, last pushed 3d ago), licensed Apache-2.0. It adds 447 tokens to every session, about $0.0018 per session on Opus 5.5. 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 2026-08-31.
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