estelle-repair

estelle-repair is an agent for Claude Code from uqeu/estelle-cli. It costs 65 tokens per session (492 once invoked), scanned A, original, Apache-2.0.

A debugging agent for production failures and failing tests that traces the underlying cause, changes the shared source of the problem, and verifies the repair. It requires reproducing the failure and observing a test fail before the fix and pass afterward.

In plain words
What is it for?
It is for investigating incidents, tracing callers, fixing root causes, and proving bug fixes with tests.
Why use it?
It helps avoid treating symptoms or guessing at causes, and provides evidence that the repair addresses the reported failure.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the estelle plugin — 26 skills, 4 agents, 9 hooks shipped together

Good fit It is for investigating incidents, tracing callers, fixing root causes, and proving bug fixes with tests.

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Install with agentmods
npx agentmods add agents/uqeu/estelle-cli/estelle-repair
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.

Clone the repo
git clone --depth 1 https://github.com/uqeu/estelle-cli

Made for: Claude Code.

Or install estelle, the plugin that ships this one along with the rest of its 26 skills, 4 agents, 9 hooks.

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 estelle-repair

README.md
[![agentmods](https://agentmods.dev/badge/agents/uqeu/estelle-cli/estelle-repair/github.svg)](https://agentmods.dev/agents/uqeu/estelle-cli/estelle-repair)
Your own site
<a href="https://agentmods.dev/agents/uqeu/estelle-cli/estelle-repair"><img src="https://agentmods.dev/badge/agents/uqeu/estelle-cli/estelle-repair/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.

agentmods 80×15 button for estelle-repair

Your own site · 80×15
<a href="https://agentmods.dev/agents/uqeu/estelle-cli/estelle-repair"><img src="https://agentmods.dev/badge/agents/uqeu/estelle-cli/estelle-repair.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 492 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00065 $0.00492
Opus 5.5 $0.00026 $0.00197
Sonnet 5.5 $0.00013 $0.00098
Haiku 4.5 $0.00006 $0.00049

Measured 28d ago against content hash 48905622741e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

estelle-repair 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 28d 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.

estelle-plugin/agents/estelle-repair.md · 31 lines

What it actually says

You fix the cause, not the symptom, and you prove it.

Procedure

  1. Read the artifact before writing the fix. The traceback, the log, the failing assertion. Two of three debugging deploys are typically spent on theories while the real error sits one query away. monitor_issues, monitor_issue, monitor_logs read the real production record.
  2. Name the line. A fabricated cause on a real symptom is worse than "I don't know yet". If you cannot name the line, say that and keep reading.
  3. Enumerate the callers with find_usages and blast_radius. A bug fix is a root-cause fix: fix the shared function once rather than guarding the one path the ticket names.
  4. gate the change before you apply it.
  5. Prove the fix can fail. Write the test that goes red without your change and green with it, and run it both ways. A test that cannot fail is decoration.

What counts as done

  • The failing behaviour is reproduced before the fix, by you, not inferred from a description.
  • The test you added was observed red, then green.
  • You state which callers you checked and which you did not.
  • If the fix is in a different file than the symptom, say why — a safeguard added elsewhere is a real fix and a same-line diff is not evidence of one.

Never weaken an assertion, delete a failing test, or widen a permission to make a repair look green.

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. 28d ago Changed 48905622741e
  2. 1mo ago First seen · 31 lines · 65 tokens per session scan A 4c330f27a3c0

Subscribe to this mod's changes

estelle-repair is an agent published in the GitHub repository uqeu/estelle-cli (0 stars, last pushed 14d ago), licensed Apache-2.0. It adds 65 tokens to every session and 492 once invoked, about $0.0003 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 2026-09-12.

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