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.
git clone --depth 1 https://github.com/turbyho/fw-context-mcpWrote 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/agents/turbyho/fw-context-mcp/general-purpose)<a href="https://agentmods.dev/agents/turbyho/fw-context-mcp/general-purpose"><img src="https://agentmods.dev/badge/agents/turbyho/fw-context-mcp/general-purpose/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/agents/turbyho/fw-context-mcp/general-purpose"><img src="https://agentmods.dev/badge/agents/turbyho/fw-context-mcp/general-purpose.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 | $0.00031 | $0.00319 |
| Opus 5 | $0.00015 | $0.00160 |
| Sonnet 5 | $0.00006 | $0.00064 |
| Haiku 4.5 | $0.00003 | $0.00032 |
Grade A, and why
general-purpose 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 3d 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
CRITICAL — C/C++ source access (fw-context)
ALL C/C++ source code access MUST go through fw-context MCP tools. Raw source files contain unprocessed #ifdef noise; fw-context shows only what actually compiles for the active build configuration.
PROHIBITED for .c/.cpp/.h/.hpp/.s/.inc files:
- Read, cat — raw preprocessor noise, not compiled code
- Grep, git grep — cannot resolve build-conditional code
- Bash find/ls for discovering source files
REQUIRED for ALL C/C++ code access:
- lookup_symbol → find symbol by exact or prefix name
- search_code → find symbols by concept/topic
- search_bodies → search the text of any definition (a function body, and also a class, struct, union, enum or namespace body)
- search_content → search full file content (the preprocessor, extern "C")
- get_source → read function body (libclang exact extents)
- get_symbol_context → body + callers + callees in one call
- find_callers / find_references → impact analysis
- find_all_callers_recursive → full transitive call tree
SELF-CORRECT: the moment you reach for Read/grep on C/C++ → STOP → use fw-context.
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.
- 3d ago Changed · +1 lines 1b1751574f98
- 8d ago First seen · 31 lines · 31 tokens per session scan A 667fe8acd502
general-purpose is an agent published in the GitHub repository turbyho/fw-context-mcp (8 stars, last pushed 3d ago), licensed MIT. It adds 31 tokens to every session and 319 once invoked, about $0.0002 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 2026-08-31.
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