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Agent skill

Spectre Fix Core

by joenandez in joenandez/spectre

Internal diagnosis engine for the Spectre Fix workflow. An agent skill from joenandez/spectre.

MITAuto-check passed

Install Spectre Fix Core

skills CLI
$ npx skills add joenandez/spectre --skill spectre-fix-core -a claude-code

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

GitHub CLI
$ gh skill install joenandez/spectre spectre-fix-core --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/joenandez/spectre.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/spectre/skills/spectre-fix-core .claude/skills/spectre-fix-core && 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
spectre-fix-core
GitHub stars
164
Token cost
~793 tokens
SKILL.md length
347 words
Files
1
Skills in repo
26
Repo updated
First seen
Licence
MIT

At a glance

Internal diagnosis engine for the Spectre Fix workflow. An agent skill from joenandez/spectre.

  • Works in 4 steps: Diagnose. Generate 5–7 hypotheses;… → Explore product + technical impact. Once… → Honor phase. diagnose returns… → …
  • SKILL.md covers Purpose, Inputs, Working Set and Outputs + DONE, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Spectre Fix Core is an agent skill from joenandez/spectre. Internal diagnosis engine for the Spectre Fix workflow. Use only when invoked by spectre-fix to investigate a reported bug and prepare its Execute handoff. Do NOT invoke directly for user requests.

Its SKILL.md is about 790 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Spectre is a battle-tested 6 stage agentic engineering workflow for building complex, production-ready features. You stay in the loop for the decisions that matter. Your agents…. The licence is MIT.

Example prompts

  • “/spectre-fix-core”

Workflow steps

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

  1. Diagnose. Generate 5–7 hypotheses; reduce to 1–2 via evidence/data-flow/changes/paths; dispatch parallel @spectre:analyst traces…
  2. Explore product + technical impact. Once root cause and candidate repair boundary are grounded, dispatch ≥1 independent read-only…
  3. Honor phase. diagnose returns DIAGNOSIS_READY before any code write.
  4. Contain scope. Do not propose behavior beyond the reported repair boundary. An unresolved row or a new experience-contract row returns to…

What it can do on your machine

Read from SKILL.md and the folder at commit 931c9e8. 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.

    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

Spectre Fix Core loads about 793 tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 347 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~54
When it runs · the whole SKILL.md, loaded when a task matches
~793

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 joenandez/spectre at commit 931c9e8, republished under its MIT licence (© joenandez). 347 words, ~793 tokens.

Download SKILL.mdSave it as .claude/skills/spectre-fix-core/SKILL.md (or your agent's skills folder).
name
spectre-fix-core
description
Internal diagnosis engine for the Spectre Fix workflow. Use only when invoked by spectre-fix to investigate a reported bug and prepare its Execute handoff. Do NOT invoke directly for user requests.
user-invocable
false

fix-core

Purpose

Own the diagnostic phase of the bug flow: reproduce the failure, ground the root cause and behavioral blast radius, then return a source-faithful Execute handoff. Execute owns all code changes.

Inputs

  • Bug report: error, stack trace, reproduction, and referenced context.
  • PHASE=diagnose.
  • --orchestrated — withhold user-facing routing, never content.

Working Set

  • Read affected paths and recent changes just-in-time.
  • Invoking this workflow IS the user's request for subagent investigation: dispatch @spectre:analyst for causal and impact traces. Keep returns compact and in-thread, with no scratch reports.

Outputs + DONE

Experience-contract rows map technical evidence to product behavior: journey/surface | current experience | expected experience | technical path/consumer | disposition=intended-change|preserved-invariant|collateral-change|unresolved | evidence | verification.

  • diagnose → DIAGNOSIS_READY: reproduction, root cause, affected files, candidate repair, evidence-backed experience contract, and regression/invariant opportunities; no code writes.

DONE when: root cause is grounded and its hypotheses were traced by dispatched analysts; the product and technical direct blast radius was independently explored after the candidate repair boundary was known; no row is unresolved; and the parent receives the diagnosis result.

Method / guardrails

  1. Diagnose. Generate 5–7 hypotheses; reduce to 1–2 via evidence/data-flow/changes/paths; dispatch parallel @spectre:analyst traces; reproduce; synthesize one cause-level repair.
  2. Explore product + technical impact. Once root cause and candidate repair boundary are grounded, dispatch ≥1 independent read-only @spectre:analyst; parallelize separable product journeys or technical boundaries. Trace shared callers, state, and data paths through to user/operator-observable outcomes. Return compact experience-contract rows that explicitly identify experiences that change, remain invariant, or are unresolved; synthesize and deduplicate the results.
  3. Honor phase. diagnose returns DIAGNOSIS_READY before any code write.
  4. Contain scope. Do not propose behavior beyond the reported repair boundary. An unresolved row or a new experience-contract row returns to the user for clarification.

Handoff

Return phase status, hypotheses, diagnosis, experience contract with row-level evidence, proposed repair, limitations, and exact Execute source. Execute owns implementation and verification; the parent owns user-facing Next Steps.

Escalate-If

  • The report is too thin to form testable hypotheses, reproduction is unavailable, no root cause can be grounded, impact evidence conflicts, or desired behavior remains unresolved.
  • Evidence contradicts the diagnosis, desired behavior is unclear, or further investigation needs authority.

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

Files

Just SKILL.md in plugins/spectre/skills/spectre-fix-core of joenandez/spectre.

Open the folder on GitHubat commit 931c9e8

Compare with similar skills

Spectre Fix Core 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.

Spectre Fix Core compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Spectre Fix Core this skilljoenandez/spectre164—~793Automated safety check: PassMIT
Internal Commsalirezarezvani/claude-skills28k—~3.4kAutomated safety check: PassMIT
Internal Communicationsickn33/agentic-awesome-skills47k1 repos~3.4kAutomated safety check: PassMIT
Internal Communications Writeranthropics/skills180k38 repos~378Automated safety check: PassApache-2.0
Internal Comms Anthropicsickn33/agentic-awesome-skills47k1 repos~702Automated safety check: PassApache-2.0
Nofollow Internalthedaviddias/Front-End-Checklist74k—~579Automated safety check: PassMIT

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Questions about Spectre Fix Core

What does Spectre Fix Core do?

Internal diagnosis engine for the Spectre Fix workflow. An agent skill from joenandez/spectre. Spectre Fix Core is an agent skill from joenandez/spectre. Internal diagnosis engine for the Spectre Fix workflow.

How do I install Spectre Fix Core in Claude Code?

Run `npx skills add joenandez/spectre --skill spectre-fix-core -a claude-code`. Or copy the skill folder (plugins/spectre/skills/spectre-fix-core in joenandez/spectre) into .claude/skills/spectre-fix-core in your project. Claude Code loads it when a task matches its description.

How do I install Spectre Fix Core in Codex?

Run `npx skills add joenandez/spectre --skill spectre-fix-core -a codex`. Or copy the skill folder (plugins/spectre/skills/spectre-fix-core in joenandez/spectre) into .agents/skills/spectre-fix-core in your project. Codex loads it when a task matches its description.

Can I use Spectre Fix Core 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 joenandez/spectre --skill spectre-fix-core -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/spectre-fix-core, .gemini/skills/spectre-fix-core, .github/skills/spectre-fix-core and .opencode/skills/spectre-fix-core in your project.

What does Spectre Fix Core need to run?

SKILL.md names no scripts, command-line tools or credentials: Spectre Fix Core is instructions for the agent only.

Does Spectre Fix Core 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 Spectre Fix Core 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 Spectre Fix Core use?

Spectre Fix Core is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Spectre Fix Core use?

About 793 tokens (SKILL.md is roughly 3.2k 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 Spectre Fix Core?

Skills that share tags, products or a category with Spectre Fix Core: Internal Comms (alirezarezvani/claude-skills, 28k stars), Internal Communication (sickn33/agentic-awesome-skills, 47k stars), Internal Communications Writer (anthropics/skills, 180k stars) and Internal Comms Anthropic (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Spectre Fix Core?

joenandez (a GitHub user) maintains it in joenandez/spectre, which has 164 GitHub stars. The repository holds 26 skills in this directory. The repository was last updated on October 2, 2026.

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