trellis-break-loop

trellis-break-loop is a skill for Claude Code, Codex from tincopper/neeko. It costs 50 tokens per session (1,601 once invoked), scanned A, a copy of trellis-break-loop, Apache-2.0.

A post-bug analysis guide for finding why a defect happened and why earlier fixes failed. It records the lesson in project specifications so the same kind of bug is less likely to return.

In plain words
What is it for?
Use it after debugging to classify the root cause, review failed attempts, identify prevention measures, and update specifications.
Why use it?
Fixing the visible symptom can leave the underlying process or missing rule unchanged. This helps turn a one-time fix into a documented prevention step.

Skill for Claude CodeCodex

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 skills/tincopper/neeko/trellis-break-loop
Any agent
npx skills add tincopper/neeko --skill trellis-break-loop
Clone the repo
git clone --depth 1 https://github.com/tincopper/neeko

Made for: Claude Code, Codex.

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 trellis-break-loop

README.md
[![agentmods](https://agentmods.dev/badge/skills/tincopper/neeko/trellis-break-loop.svg)](https://agentmods.dev/skills/tincopper/neeko/trellis-break-loop)
Your own site
<a href="https://agentmods.dev/skills/tincopper/neeko/trellis-break-loop"><img src="https://agentmods.dev/badge/skills/tincopper/neeko/trellis-break-loop.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,601 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 5.1 $0.00050 $0.01601
Opus 5 $0.00025 $0.00800
Sonnet 5 $0.00010 $0.00320
Haiku 4.5 $0.00005 $0.00160

Measured 5d ago against content hash f5a93699832f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

trellis-break-loop 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 5d 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.

Origin

This is a copy

100% identical to trellis-break-loop — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/trellis-break-loop/SKILL.md · 189 lines

How it starts

The opening of the file, as written. The whole thing — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Break the Loop - Deep Bug Analysis

When debug is complete, use this for deep analysis to break the "fix bug -> forget -> repeat" cycle.


Analysis Framework

Analyze the bug you just fixed from these 5 dimensions:

1. Root Cause Category

Which category does this bug belong to?

Category Characteristics Example
A. Missing Spec No documentation on how to do it New feature without checklist
B. Cross-Layer Contract Interface between layers unclear API returns different format than expected
C. Change Propagation Failure Changed one place, missed others Changed function signature, missed call sites
D. Test Coverage Gap Unit test passes, integration fails Works alone, breaks when combined
E. Implicit Assumption Code relies on undocumented assumption Timestamp seconds vs milliseconds

2. Why Fixes Failed (if applicable)

If you tried multiple fixes before succeeding, analyze each failure:

  • Surface Fix: Fixed symptom, not root cause
  • Incomplete Scope: Found root cause, didn't cover all cases
  • Tool Limitation: grep missed it, type check wasn't strict
  • Mental Model: Kept looking in same layer, didn't think cross-layer

3. Prevention Mechanisms

What mechanisms would prevent this from happening again?

Type Description Example
Documentation Write it down so people know Update thinking guide
Architecture Make the error impossible structurally Type-safe wrappers
Compile-time Strict type checking, no escape hatches Signature change causes compile error
Runtime Monitoring, alerts, scans Detect orphan entities
Test Coverage E2E tests, integration tests Verify full flow
Code Review Checklist, PR template "Did you check X?"

4. Systematic Expansion

What broader problems does this bug reveal?

  • Similar Issues: Where else might this problem exist?
  • Design Flaw: Is there a fundamental architecture issue?
  • Process Flaw: Is there a development process improvement?
  • Knowledge Gap: Is the team missing some understanding?

Read the full file on GitHub · 189 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 5d ago First seen · 189 lines · 50 tokens per session scan A f5a93699832f

Subscribe to this mod's changes

trellis-break-loop is a skill published in the GitHub repository tincopper/neeko (11 stars, last pushed yesterday), licensed Apache-2.0. It adds 50 tokens to every session and 1,601 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to trellis-break-loop, differing in 0 lines, and is treated as a copy.

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