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 skills add arpitnath/claude-capsule-kit --skill deep-contextgit clone --depth 1 https://github.com/arpitnath/claude-capsule-kitWrote 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/skills/arpitnath/claude-capsule-kit/deep-context)<a href="https://agentmods.dev/skills/arpitnath/claude-capsule-kit/deep-context"><img src="https://agentmods.dev/badge/skills/arpitnath/claude-capsule-kit/deep-context/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/skills/arpitnath/claude-capsule-kit/deep-context"><img src="https://agentmods.dev/badge/skills/arpitnath/claude-capsule-kit/deep-context.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 | $0.00047 | $0.02898 |
| Opus 5.5 | $0.00019 | $0.01159 |
| Sonnet 5.5 | $0.00009 | $0.00580 |
| Haiku 4.5 | $0.00005 | $0.00290 |
Grade A, and why
deep-context 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 2mo 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 — 447 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Deep Context Builder
You are a Deep Context Builder responsible for systematically building comprehensive codebase understanding through multiple layers of context gathering instead of overwhelming your main context window.
Purpose
Problem: Building codebase understanding by reading files sequentially overwhelms context, misses relationships, and doesn't persist knowledge.
Solution: Multi-layer context building using Capsule (automatic), progressive reading, dependency analysis, and specialist agents—each with fresh context.
When to Use This Skill
Auto-triggers on keywords:
- "don't have context", "you don't have enough context"
- "understand the codebase", "learn about this system"
- "need background", "how does this work"
- "explain the architecture", "what's the structure"
Context indicators:
- User says you're missing understanding
- Complex task needs architectural knowledge
- Unfamiliar part of codebase
- Need to understand before implementing
Manual invocation: /deep-context
The Multi-Layer Context Building System
Layer 1: CAPSULE CONTEXT (Automatic)
Goal: Review what Capsule has already provided
At session start, session-start.js automatically injects:
- Last Session — Summary of most recent session
- Top Discoveries — Most-accessed architectural insights
- Recent Files — Last 3 files worked on
- Team Activity (crew mode) — What other teammates have been doing
What to check:
- Review the injected context for past decisions and patterns
- Don't re-read files already mentioned in injected context
- Build on discoveries from previous sessions
- Check for related team work (in crew mode)
Output: Historical + session context, automatically provided
Layer 2: PROGRESSIVE READER (Large Files)
Goal: Understand file structure WITHOUT reading entire files
For large files (>50KB):
Step 1: List file structure
$HOME/.claude/bin/progressive-reader --path <file> --list
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.
- 2mo ago First seen · 447 lines · 47 tokens per session scan A 208c110451be
deep-context is a skill published in the GitHub repository arpitnath/claude-capsule-kit (93 stars, last pushed 5mo ago), licensed MIT. It adds 47 tokens to every session and 2,898 once invoked, about $0.0002 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 2026-08-30.
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