opsx-ff

opsx-ff is a skill for Claude Code from fjpulidop/specrails-core. It costs 33 tokens per session (1,188 once invoked), scanned A, a copy of openspec-ff-change, MIT.

A shortcut for creating all OpenSpec planning documents needed before implementation. OpenSpec is a workflow that records a software change through artifacts such as proposals, designs, and task lists.

In plain words
What is it for?
Use it with a change name or feature description to generate the planning artifacts required to begin implementation.
Why use it?
It reduces the time needed to prepare a change when you already know what you want to build. It turns a description into a ready-to-implement plan in one pass.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: names the AskUserQuestion tool.

Part of the specrails plugin — 28 skills, 14 agents shipped together

Good fit Use it with a change name or feature description to generate the planning artifacts required to begin implementation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fjpulidop/specrails-core/opsx-ff
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.

Any agent
npx skills add fjpulidop/specrails-core --skill opsx-ff
Clone the repo
git clone --depth 1 https://github.com/fjpulidop/specrails-core

Made for: Claude Code.

Or install specrails, the plugin that ships this one along with the rest of its 28 skills, 14 agents.

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 opsx-ff

README.md
[![agentmods](https://agentmods.dev/badge/skills/fjpulidop/specrails-core/opsx-ff.svg)](https://agentmods.dev/skills/fjpulidop/specrails-core/opsx-ff)
Your own site
<a href="https://agentmods.dev/skills/fjpulidop/specrails-core/opsx-ff"><img src="https://agentmods.dev/badge/skills/fjpulidop/specrails-core/opsx-ff.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,188 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 89% 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 $0.00033 $0.01188
Opus 5 $0.00016 $0.00594
Sonnet 5 $0.00007 $0.00238
Haiku 4.5 $0.00003 $0.00119

Measured 7d ago against content hash fe89dd099013, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

opsx-ff 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 7d 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

89% identical to openspec-ff-change — 20 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.

specrails-plugin/skills/opsx-ff/SKILL.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenSpec project root. The openspec/ directory lives in the REPO, not the workspace this skill is driven from. The repo root is ${SPECRAILS_REPO_DIR:-.} (a default-unset env var: when unset it resolves to ., i.e. the current directory, so a classic in-repo run is unchanged). Run EVERY openspec command against that root — wrap each invocation as (cd "${SPECRAILS_REPO_DIR:-.}" && openspec …). Treat ${SPECRAILS_REPO_DIR:-.} as the OpenSpec project root for any path the CLI prints or you read/write.

Fast-forward through artifact creation - generate everything needed to start implementation in one go.

Input: The user's request should include a change name (kebab-case) OR a description of what they want to build.

Steps

  1. If no clear input provided, ask what they want to build

    Use the AskUserQuestion tool (open-ended, no preset options) to ask:

    "What change do you want to work on? Describe what you want to build or fix."

    From their description, derive a kebab-case name (e.g., "add user authentication" → add-user-auth).

    IMPORTANT: Do NOT proceed without understanding what the user wants to build.

  2. Create the change directory

    (cd "${SPECRAILS_REPO_DIR:-.}" && openspec new change "<name>")
    

    This creates a scaffolded change at openspec/changes/<name>/.

  3. Get the artifact build order

    (cd "${SPECRAILS_REPO_DIR:-.}" && openspec status --change "<name>" --json)
    

    Parse the JSON to get:

    • applyRequires: array of artifact IDs needed before implementation (e.g., ["tasks"])
    • artifacts: list of all artifacts with their status and dependencies
  4. Create artifacts in sequence until apply-ready

    Use the TodoWrite tool to track progress through the artifacts.

    Loop through artifacts in dependency order (artifacts with no pending dependencies first):

    a. For each artifact that is ready (dependencies satisfied):

    • Get instructions:
      (cd "${SPECRAILS_REPO_DIR:-.}" && openspec instructions <artifact-id> --change "<name>" --json)
      
    • The instructions JSON includes:
      • context: Project background (constraints for you - do NOT include in output)
      • rules: Artifact-specific rules (constraints for you - do NOT include in output)
      • template: The structure to use for your output file
      • instruction: Schema-specific guidance for this artifact type
      • outputPath: Where to write the artifact
      • dependencies: Completed artifacts to read for context
    • Read any completed dependency files for context
    • Create the artifact file using template as the structure
    • Apply context and rules as constraints - but do NOT copy them into the file
    • Show brief progress: "✓ Created "

    b. Continue until all applyRequires artifacts are complete

    • After creating each artifact, re-run openspec status --change "<name>" --json
    • Check if every artifact ID in applyRequires has status: "done" in the artifacts array
    • Stop when all applyRequires artifacts are done

    c. If an artifact requires user input (unclear context):

    • Use AskUserQuestion tool to clarify
    • Then continue with creation
  5. Show final status

    (cd "${SPECRAILS_REPO_DIR:-.}" && openspec status --change "<name>")
    

Output

After completing all artifacts, summarize:

  • Change name and location
  • List of artifacts created with brief descriptions
  • What's ready: "All artifacts created! Ready for implementation."
  • Prompt: "Run /opsx:apply or ask me to implement to start working on the tasks."

Artifact Creation Guidelines

  • Follow the instruction field from openspec instructions for each artifact type
  • The schema defines what each artifact should contain - follow it
  • Read dependency artifacts for context before creating new ones
  • Use template as the structure for your output file - fill in its sections
  • IMPORTANT: context and rules are constraints for YOU, not content for the file
    • Do NOT copy <context>, <rules>, <project_context> blocks into the artifact
    • These guide what you write, but should never appear in the output

Read the full file on GitHub · 110 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. 7d ago First seen · 110 lines · 33 tokens per session scan A fe89dd099013

Subscribe to this mod's changes

opsx-ff is a skill published in the GitHub repository fjpulidop/specrails-core (9 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 1,188 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to openspec-ff-change, differing in 20 lines, and is treated as a copy.

Related

Other skills, from other repositories

local-execution-planner

Plan a repository task for execution by a small local coding model, then hand the plan to the local executor over MCP. Inspect the codebase, decompose the work into self-contained sequential prompts, define deterministic eval gates, validate the manifest, and submit it for execution. Never implement the task.

kangwa/penny · 65 tokens

taiyi-evolve

A workflow skill that compares the implemented code with the frozen design after development and testing. It records architecture changes and proposes updates to DESIGN.md, the document describing the intended system structure.

Dong90/oh-my-taiyiforge · 37 tokens

taiyi-diagram-c4

A code-scanning tool that builds C4 architecture documents from a repository. It separates facts observed in the code from conclusions inferred about the design and uses Mermaid diagrams as the source format.

Dong90/oh-my-taiyiforge · 48 tokens

security-review

Perform a focused security review of pending git changes to identify high-confidence security vulnerabilities with real exploitation potential. Use this skill when the user asks for a security review, security audit, vulnerability scan, or wants to check pending changes on a branch for security issues before merging.…

waybarrios/opencode-power-pack · 64 tokens

huggingface-llm-trainer

Train or fine-tune language models with TRL or Unsloth on Hugging Face Jobs, including SFT, DPO, GRPO, reward models, and GGUF conversion. Use for cloud LLM training; use huggingface-vision-trainer for vision tasks.

waybarrios/opencode-power-pack · 65 tokens

memstack-business-gdpr

Use this skill when the user says 'GDPR', 'data protection', 'privacy compliance', 'DPA', 'DSAR', 'data subject request', 'cookie consent', 'privacy audit', 'CCPA', or asks 'do I need GDPR for this repo'. Scans the repository to detect what personal data is collected, classifies sensitivity, determines whether GDPR…

cwinvestments/memstack · 121 tokens