epistract-index

epistract-index is a command for coding agents from usathyan/epistract. It costs 19 tokens per session (317 once invoked), scanned A, original, MIT.

A command that builds or refreshes a project's search index from document text and knowledge-graph entities. The index is a database that helps find relevant passages, and unchanged documents are skipped during incremental updates.

In plain words
What is it for?
Use it after adding project files to index new content, rebuild the index when needed, and report indexed documents, text chunks, and entities.
Why use it?
It avoids rebuilding the whole index after every file change and makes a project's stored material searchable.

Command

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the epistract plugin — 5 skills, 22 commands, 3 agents shipped together

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 commands/usathyan/epistract/index
Clone the repo
git clone --depth 1 https://github.com/usathyan/epistract

Or install epistract, the plugin that ships this one along with the rest of its 5 skills, 22 commands, 3 agents.

Wrote 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.

agentmods badge for epistract-index

README.md
[![agentmods](https://agentmods.dev/badge/commands/usathyan/epistract/index.svg)](https://agentmods.dev/commands/usathyan/epistract/index)
Your own site
<a href="https://agentmods.dev/commands/usathyan/epistract/index"><img src="https://agentmods.dev/badge/commands/usathyan/epistract/index.svg" alt="Measured on agentmods" height="20"></a>
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 317 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00019 $0.00317
Opus 5 $0.00010 $0.00159
Sonnet 5 $0.00004 $0.00063
Haiku 4.5 $0.00002 $0.00032

Measured 4d ago against content hash 1a802fb4aad9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

epistract-index 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 4d 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.

commands/index.md · 37 lines

What it actually says

Build or refresh a project's hybrid search index (SQLite FTS5 over document chunks plus entities from the knowledge graph). Indexing is incremental: documents whose content hash is unchanged since the last run are skipped, so re-indexing after /epistract:add-files only processes the new material.

This indexes raw corpus text for search. To build the knowledge graph itself from extractions, use /epistract:build; the index picks up graph entities automatically once graph_data.json exists.

Usage Guard

If invoked with no arguments or with --help: Display the following usage block verbatim and stop.

Usage: /epistract:index [--project <name>] [--rebuild]

Options:
  --project <name>   Target project (default: detected from cwd or $EPISTRACT_PROJECT)
  --rebuild          Drop and rebuild the index from scratch

Examples:
  /epistract:index --project glp1-research
  /epistract:index --project glp1-research --rebuild
PYTHONPATH="${CLAUDE_PLUGIN_ROOT}" python3 -m core.cli index [--project NAME] [--rebuild]

Report how many documents were indexed vs. skipped, total chunks, and entity count. Then suggest /epistract:search <query> --project <name>.

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. 4d ago First seen · 37 lines · 19 tokens per session scan A 1a802fb4aad9

Subscribe to this mod's changes

epistract-index is a command published in the GitHub repository usathyan/epistract (8 stars, last pushed 19d ago), licensed MIT. It adds 19 tokens to every session and 317 once invoked, about $0.0001 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.