Agent skill

Identify Key Failures

by frenzymath in frenzymath/Danus

Synthesize the common stuck points across failed decomposition plans.

Apache-2.0Auto-check passed

Install Identify Key Failures

skills CLI
$ npx skills add frenzymath/Danus --skill identify-key-failures -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install frenzymath/Danus identify-key-failures --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/frenzymath/Danus.git skills-src && mkdir -p .claude/skills && cp -r skills-src/agents/skills/worker/identify-key-failures .claude/skills/identify-key-failures && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
identify-key-failures
GitHub stars
476
Token cost
~586 tokens
SKILL.md length
248 words
Files
2
Skills in repo
16
Repo updated
First seen
Licence
Apache-2.0

At a glance

Synthesize the common stuck points across failed decomposition plans.

  • Works in 7 steps: Gather the reports from all failed… → List the key stuck points for each plan. → Identify common points across those… → …
  • The current batch of decomposition plans has failed — whether they failed already at direct proving
  • SKILL.md covers Input Contract, Procedure, Output Contract and Tools, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Identify Key Failures is an agent skill from frenzymath/Danus. Synthesize the common stuck points across failed decomposition plans. Use when the current batch of decomposition plans has failed — whether they failed already at direct proving or only after further attempts.

Its SKILL.md is about 590 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

The repository describes itself as: Orchestrating Mathematical Reasoning Agents with Fact-Graph Memory. The licence is Apache-2.0.

When your agent uses it

  • The current batch of decomposition plans has failed — whether they failed already at direct proving
  • Only after further attempts

Example prompts

  • “/identify-key-failures”

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

  1. Gather the reports from all failed plans. If only direct proving has run so far, work directly from the direct-proving failures.
  2. List the key stuck points for each plan.
  3. Identify common points across those failures
  4. Summarize what the failures suggest for the next generation of decomposition plans.
  5. When all current decomposition plans have failed and no pattern is leading anywhere, publish the synthesized dead_end (below): the main…
  6. Save the synthesized failure knowledge to failed_paths so later planning skills can use it.
  7. After recording the failure synthesis, return control to $propose-subgoal-decomposition-plans.

What it can do on your machine

Read from SKILL.md and the folder at commit 6d92e8d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are json).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Identify Key Failures loads about 586 tokens when it runs. Until then it costs about 58 tokens; SKILL.md has 248 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~58
When it runs · the whole SKILL.md, loaded when a task matches
~586

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from frenzymath/Danus at commit 6d92e8d, republished under its Apache-2.0 licence (© frenzymath). 248 words, ~586 tokens.

Download SKILL.mdSave it as .claude/skills/identify-key-failures/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
identify-key-failures
description
Synthesize the common stuck points across failed decomposition plans. Use when the current batch of decomposition plans has failed — whether they failed already at direct proving or only after further attempts.

Identify Key Failures

Use this skill to turn many failed attempts into reusable guidance for the next planning round.

Input Contract

Read:

  • the failed decomposition plans
  • direct-proving stuck points
  • existing failed_paths
  • relevant counterexamples and toy_examples

Procedure

  1. Gather the reports from all failed plans. If only direct proving has run so far, work directly from the direct-proving failures.
  2. List the key stuck points for each plan.
  3. Identify common points across those failures:
    • recurring obstructions or counterexamples
    • decomposition patterns that keep breaking
    • search gaps or missing background facts
  4. Summarize what the failures suggest for the next generation of decomposition plans.
  5. When all current decomposition plans have failed and no pattern is leading anywhere, publish the synthesized dead_end (below): the main agent reasons or launches exploratory subagents, then delivers a fresh direction as master_guidance.
  6. Save the synthesized failure knowledge to failed_paths so later planning skills can use it.
  7. After recording the failure synthesis, return control to $propose-subgoal-decomposition-plans.

Output Contract

Publish the failure synthesis to global memory with gm_add (kind dead_end): claim = the common stuck points, evidence = the per-plan failures, so siblings skip these paths. Carry these fields:

json
{
  "record_type": "key_failures_summary",
  "failed_plan_ids": ["..."],
  "plan_failures": [
    {
      "plan_id": "...",
      "stuck_points": ["..."]
    }
  ],
  "common_failures": ["..."],
  "implications_for_next_plans": ["..."]
}

Also note in your local memory (events) that a new planning round is needed.

Tools

  • gm_add (publish the dead_end synthesis)
  • gm_search (gather the failed plans and stuck points across the swarm)

Failure Logging

If the reports are too weak to identify meaningful common failures, note in local memory (events) event_type="key_failures_inconclusive" and state what information is still missing.

© frenzymath, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in agents/skills/worker/identify-key-failures of frenzymath/Danus.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit 6d92e8d

Compare with similar skills

Identify Key Failures next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Identify Key Failures compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Identify Key Failures this skillfrenzymath/Danus476—~586Automated safety check: PassApache-2.0
Plancodewhale-hq/Codewhale41k—~213Automated safety check: PassMIT
Decomposition Planning Roadmaptech-leads-club/agent-skills7k—~4.3kAutomated safety check: PassCustom licence
Planningn8n-io/n8n207k—~2.5kAutomated safety check: PassCustom licence
Planasgeirtj/system_prompts_leaks69k—~5.1kAutomated safety check: PassCC0-1.0
CEO Plan Reviewgarrytan/gstack136k—~20kAutomated safety check: NotesMIT

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More from frenzymath/Danus

All 16 skills in this repo
  • Validate externally referenced theorems by querying arXiv theorem search first and Codex's built-in web search second.

    476 GitHub stars~852 tokensUpdated 1 mo ago
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  • Construct candidate counterexamples to test a proposed conjecture, lemma, or intermediate claim by keeping the assumptions true while making the claimed conclusion fail.

    476 GitHub stars~790 tokensUpdated 1 mo ago
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  • Construct Toy Examples

    frenzymath/Danus

    Generate and analyze simpler examples that satisfy both the assumptions and the conclusion of a theorem statement or subgoal.

    476 GitHub stars~541 tokensUpdated 1 mo ago
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  • Direct Proving

    frenzymath/Danus

    Screen a decomposition plan by first trying to prove all of its subgoals directly, then identifying the key stuck points if the plan does not fully go through.

    476 GitHub stars~1.3k tokensUpdated 1 mo ago
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  • Derive immediate mathematical consequences from a theorem statement or subgoal.

    476 GitHub stars~587 tokensUpdated 1 mo ago
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  • Propose multiple subgoal decomposition plans for the current theorem using the information already gathered.

    476 GitHub stars~580 tokensUpdated 1 mo ago
    Auto-check passed

Questions about Identify Key Failures

What does Identify Key Failures do?

Synthesize the common stuck points across failed decomposition plans. Identify Key Failures is an agent skill from frenzymath/Danus. Synthesize the common stuck points across failed decomposition plans.

When should I use Identify Key Failures?

Identify Key Failures fits situations like: the current batch of decomposition plans has failed — whether they failed already at direct proving; only after further attempts.

How do I install Identify Key Failures in Claude Code?

Run `npx skills add frenzymath/Danus --skill identify-key-failures -a claude-code`. Or copy the skill folder (agents/skills/worker/identify-key-failures in frenzymath/Danus) into .claude/skills/identify-key-failures in your project. Claude Code loads it when a task matches its description.

How do I install Identify Key Failures in Codex?

Run `npx skills add frenzymath/Danus --skill identify-key-failures -a codex`. Or copy the skill folder (agents/skills/worker/identify-key-failures in frenzymath/Danus) into .agents/skills/identify-key-failures in your project. Codex loads it when a task matches its description.

Can I use Identify Key Failures in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add frenzymath/Danus --skill identify-key-failures -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/identify-key-failures, .gemini/skills/identify-key-failures, .github/skills/identify-key-failures and .opencode/skills/identify-key-failures in your project.

What does Identify Key Failures need to run?

SKILL.md names no scripts, command-line tools or credentials: Identify Key Failures is instructions for the agent only.

Does Identify Key Failures access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Identify Key Failures safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Identify Key Failures use?

Identify Key Failures is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Identify Key Failures use?

About 586 tokens (SKILL.md is roughly 2.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Identify Key Failures?

Skills that share tags, products or a category with Identify Key Failures: Plan (codewhale-hq/Codewhale, 41k stars), Decomposition Planning Roadmap (tech-leads-club/agent-skills, 7k stars), Planning (n8n-io/n8n, 207k stars) and Plan (asgeirtj/system_prompts_leaks, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Identify Key Failures?

frenzymath (a GitHub organization) maintains it in frenzymath/Danus, which has 476 GitHub stars. The repository holds 16 skills in this directory. The repository was last updated on August 27, 2026.

Source: frenzymath/Danus on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.