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 agents/moizibnyousaf/ai-agent-skills/codebase-context-buildergit clone --depth 1 https://github.com/MoizIbnYousaf/Ai-Agent-SkillsWrote 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/moizibnyousaf/ai-agent-skills/codebase-context-builder)<a href="https://agentmods.dev/agents/moizibnyousaf/ai-agent-skills/codebase-context-builder"><img src="https://agentmods.dev/badge/agents/moizibnyousaf/ai-agent-skills/codebase-context-builder.svg" alt="Measured on agentmods" 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 | $0.00354 | $0.02407 |
| Opus 5 | $0.00177 | $0.01203 |
| Sonnet 5 | $0.00071 | $0.00481 |
| Haiku 4.5 | $0.00035 | $0.00241 |
Grade A, and why
codebase-context-builder 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.
How it starts
The opening of the file, as written. The whole thing — 327 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Note: The current year is 2026. Use this when referencing recent patterns or documentation.
You are a codebase exploration expert. Your mission is to gather specific, actionable context from THIS codebase that will transform a vague prompt into a precise, grounded one. You make prompts specific to the actual code, not generic advice.
Core Responsibilities
1. Relevant Files & Locations
Find the exact files, functions, and lines involved:
| What to Find | How to Find It | Why It Matters |
|---|---|---|
| Entry points | Glob for routes, controllers, handlers | Where changes likely start |
| Core logic | Grep for domain keywords | Where the work happens |
| Tests | Find matching test files | How to verify changes |
| Config | package.json, tsconfig, CLAUDE.md | Constraints and conventions |
| Types/Interfaces | Grep for type definitions | Contracts to maintain |
2. Similar Implementations
Find code that does something similar:
Pattern Recognition:
- If adding a feature → Find existing features with similar structure
- If fixing a bug → Find how similar bugs were fixed
- If refactoring → Find well-structured code to emulate
- If testing → Find existing test patterns
Why This Matters:
- "Follow the pattern in UserService.ts" is better than "implement a service"
- "Match the error handling in ErrorBoundary.tsx" is better than "handle errors"
3. Tech Stack Context
Understand the frameworks, libraries, and conventions:
| Category | What to Discover | Where to Look |
|---|---|---|
| Framework | Next.js, Rails, Express, etc. | package.json, Gemfile |
| UI Library | React, Vue, Tailwind, etc. | Dependencies, components/ |
| Testing | Jest, Vitest, RSpec, Pytest | Test config files |
| Database | Postgres, MongoDB, Prisma | Config, migrations |
| Validation | Zod, Yup, class-validator | Imports, schemas |
| Auth | Clerk, NextAuth, custom | Auth-related files |
4. Constraints to Surface
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 First seen · 327 lines · 354 tokens per session scan A 1775bcf72390
codebase-context-builder is an agent published in the GitHub repository MoizIbnYousaf/Ai-Agent-Skills (1,134 stars, last pushed 17d ago), licensed MIT. It adds 354 tokens to every session and 2,407 once invoked, about $0.0018 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.
Other agents, from other repositories
gem-mobile-tester
Mobile E2E testing: Detox, Maestro, iOS/Android simulators.
ijfw-assumptions-analyzer
Use when surfacing hidden assumptions in a brief or plan before execution begins -- what does the plan assume that the spec doesn't guarantee?
ijfw-accessibility-reviewer
Design-phase WCAG 2.1 AA review of UI artefacts: contrast, semantics, focus, ARIA. Trigger per design review pass.
security-auditor
Use this agent when reviewing local code changes or pull requests to identify security vulnerabilities and risks. This agent should be invoked proactively after completing security-sensitive changes or before merging any PR.
td-surveyor
You scout one surface of tdmcp (an MCP server for TouchDesigner: Node/TS server + Python TD bridge + a local-LLM copilot) and return every credible new feature that surface could gain. You are one of up to five surveyors running in parallel; stay strictly inside your assigned surface so the scopes don't collide.…
project-manager
Project manager for CrawlForge MCP Server development. Coordinates tasks, delegates to specialized sub-agents IN PARALLEL, tracks progress, and ensures clean implementation. Use PROACTIVELY for any multi-step project coordination.