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.
npx agentmods add agents/hundia/autospec/research-openspecgit clone --depth 1 https://github.com/Hundia/autospecWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.07027 |
| Opus 5 | $0.00000 | $0.03513 |
| Sonnet 5 | $0.00000 | $0.01405 |
| Haiku 4.5 | $0.00000 | $0.00703 |
Grade A, and why
research-openspec 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 586 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Research Report: OpenSpec
Researcher: B Date: 2026-03-20
What Is OpenSpec
"OpenSpec" is not a single product. Three distinct things share or are associated with the name:
1. @fission-ai/openspec (npm package / Fission-AI project)
The primary, actively-maintained tool. Published by Fission-AI at github.com/Fission-AI/OpenSpec. Latest version: 1.2.0 (February 2026). A globally-installed CLI tool for spec-driven development (SDD). It manages structured markdown artifacts (proposals, specs, design docs, task lists) and generates tool-specific slash-command adapters for 24+ AI coding assistants including Claude Code, Cursor, Windsurf, Gemini CLI, GitHub Copilot, Continue, Amazon Q, Cline, RooCode, Codex, and more.
Critical insight: OpenSpec does NOT call any LLM itself. It is a pure file-management and instruction-generation layer. It produces local markdown files and injects context into the user's existing AI assistant via that assistant's native slash-command or skill system.
2. openspec-for-copilot (VS Code extension, by atman-33)
A community-built VS Code extension at github.com/atman-33/openspec-for-copilot. It brings spec-driven workflows into VS Code by sending compiled prompts to GitHub Copilot Chat (via sendPromptToChat() utility) or optionally to Codex Chat. Not an official Fission-AI product.
3. GitHub Copilot SDK (@github/copilot-sdk)
Not "OpenSpec" but directly relevant to the no-API-key model this report targets. Official GitHub SDK for embedding Copilot agent capabilities via JSON-RPC into any Node/Python/Go/.NET application.
LLM Integration Architecture
Path A: @fission-ai/openspec — The Prompt-File Delegation Model
OpenSpec uses zero direct LLM calls. Its architecture is:
openspec init
↓
Scans for existing AI tool directories (.claude/, .cursor/, .gemini/, etc.)
↓
CommandAdapterRegistry generates tool-specific files:
Claude Code → .claude/commands/opsx/<workflow>.md
Cursor → .cursor/commands/opsx-<workflow>.md
Gemini CLI → .gemini/commands/opsx/<workflow>.toml
Windsurf → .windsurf/workflows/opsx-<workflow>.md
GitHub Copilot → .github/prompts/opsx-<workflow>.prompt.md
↓
Skills layer: .claude/skills/openspec-propose/SKILL.md (universal YAML-fronted markdown)
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.
- 2d ago First seen · 586 lines · 0 tokens per session scan A 8f60bb626a14
research-openspec is an agent published in the GitHub repository Hundia/autospec (4 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 7,027 tokens. 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 2026-08-31.
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