rlm

A protocol for having a coding agent examine very large files, logs, repositories, or datasets in small, structured steps. It uses code to search and summarize data so only relevant results enter the agent's working context.

In plain words
What is it for?
Use it for codebase-wide searches, dependency analysis, large-log investigation, and multi-step extraction from files or data that are too large to read directly.
Why use it?
Large inputs can exceed an agent's context limit or waste space when copied in full. This keeps raw data out of the conversation while preserving useful findings.

Agent

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 agents/lets7512/rlm-skill/rlm
Clone the repo
git clone --depth 1 https://github.com/Lets7512/rlm-skill
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 730 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00042 $0.00730
Opus 5 $0.00021 $0.00365
Sonnet 5 $0.00008 $0.00146
Haiku 4.5 $0.00004 $0.00073

Measured 2d ago against content hash d2e670c86fee, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

rlm scanned grade A with 1 finding 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 2d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Assess file type, size, line count, preview (200 chars). Use **glob** tool for multi-file discovery (never `find` via Bash). **WebFetch is blocked** — download via python3 urllib, save locally, then process.
.opencode/agents/rlm.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

RLM - Recursive Language Model Protocol

Based on MIT's RLM paper (arXiv:2512.24601) and DSPy's structured REPL pattern. Explore data programmatically — only printed results enter context.

Tokens are CPU, not storage. Never dump raw data into context. Write code to extract what matters, print only the summary.

When to Use

  • File/data too large for context window (logs, databases, binaries)
  • Codebase-wide analysis (grep across 100+ files, dependency graphs)
  • Multi-step data extraction where each step depends on prior results
  • Any task where raw data would burn tokens without adding value

Decision Logic

Size Protocol
< 5KB Read directly — no RLM needed
5KB-500KB Steps 1-3 (METADATA, PEEK, SEARCH)
500KB+ Full 6-step protocol with sub-agent decomposition

6-Step Protocol

Execute IN ORDER. Each step uses python3 -c (or python -c on Windows). Raw data never enters context. Prefer python scripts over PowerShell for data processing.

Step 1: METADATA

Assess file type, size, line count, preview (200 chars). Use glob tool for multi-file discovery (never find via Bash). WebFetch is blocked — download via python3 urllib, save locally, then process.

Step 2: PEEK

Sample head (20 lines), tail (10 lines), random slices to understand structure.

Step 3: SEARCH

Targeted extraction: regex, AST parsing, JSON key traversal based on PEEK findings.

Step 4: ANALYZE (500KB+ only)

Sub-agent decomposition — up to 15 sub-queries. Use @explore sub-agents for parallel chunk analysis. Extract each chunk via python3 -c, pass to sub-agent:

with open('/path/to/file') as f:
    lines = f.readlines()
chunk = lines[START:END]
print(f'=== Chunk N ({len(chunk)} lines) ===')
for l in chunk: print(l.rstrip())

Sub-query types: chunk analysis, cross-reference, semantic filter, recursive drill.

Step 5: SYNTHESIZE

Combine findings, cross-reference, resolve conflicts.

Step 6: SUBMIT

Read the full file on GitHub · 96 lines

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. 2d ago First seen · 96 lines · 42 tokens per session scan A d2e670c86fee

Subscribe to this mod's changes

rlm is an agent published in the GitHub repository Lets7512/rlm-skill (24 stars, last pushed 5mo ago), licensed MIT. It adds 42 tokens to every session and 730 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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