Observability and Evaluation · Public

OpenSpec

Observability and evaluation project for turning logs, quality metrics, drift, or experiment results into reviewable signals.

ObservabilityEvaluationQuality metricsData driftExperiment tracking

Best fitDevelopers who need reviewable observability or evaluation workflows for AI apps, data pipelines, or experiments.

Check whether this project matches your task before installing it.

What it can doObservability setup paths, metric boundaries, sample-data redaction, evaluation checks, and failure triage

Review the portable capability path.

Before continuingVerify in a sandbox

Do not treat a preview pack as a proven local install.

GitHub snapshot47k stars

3.3k forks · 59 contributors

Official first step Read manual preview Source repository

Publication status · 2026-05-25

What is OpenSpec?

OpenSpec helps developers observe, evaluate, or monitor AI/data application behavior and quality.
Best fit: Developers who need reviewable observability or evaluation workflows for AI apps, data pipelines, or experiments.
Not for: Not for users without logs/sample data, privacy boundaries, or those who only need a chat UI.
Capability added to an AI workflow: Observability setup paths, metric boundaries, sample-data redaction, evaluation checks, and failure triage
First safe verification step: Verify collection, metric interpretation, export, and deletion paths with redacted sample data first.
Verification state: source, Quick Start, and sandbox install checks are recorded as passed.
Top risk: The main risk is sending sensitive logs, user data, or misleading metrics into production observability.
Evidence base: https://github.com/Fission-AI/OpenSpec, https://github.com/Fission-AI/OpenSpec#readme, Human Manual, Pitfall Log

Quick decision

Use this section to decide whether the project is worth a deeper read.

Best forDevelopers who need reviewable observability or evaluation workflows for AI apps, data pipelines, or experiments.

Match the project to your task before installing it.

CapabilityObservability setup paths, metric boundaries, sample-data redaction, evaluation checks, and failure triage

Observability and evaluation project for turning logs, quality metrics, drift, or experiment results into reviewable signals.

RepositoryFission-AI/OpenSpec

47k stars · 3.3k forks

What it can do

Translate the upstream project into concrete capabilities the user can judge before installing.

Introduction to OpenSpec

Related topics: Getting Started, System Architecture

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

Getting Started

Related topics: Introduction to OpenSpec, Slash Commands

Sources: [README.md:1]()

System Architecture

Related topics: Introduction to OpenSpec, Artifact Graph System, Workflows

Sources: [openspec/changes/archive/2025-08-06-add-init-command/design.md:1-50]()

Slash Commands

Related topics: Workflows, Getting Started, Supported AI Tools

Sources: [openspec/changes/archive/2025-09-29-add-slash-command-support/proposal.md:1-20]()

Workflows

Related topics: Slash Commands, Artifact Graph System

Sources: [README.md](https://github.com/Fission-AI/OpenSpec/blob/main/README.md)

Sources: https://github.com/Fission-AI/OpenSpec, Human Manual, Project Pack evidence, and downstream validation signals.

Community Discussion Evidence

Project-level external discussion stays visible on the detail page, not only inside the manual.

Stars47k stars

Forks3.3k forks

Contributors59 contributors

Licenseunknown

Community Discussion Evidence

12 source-linked items

Review these external discussions before using OpenSpec with real data or production workflows. They are review inputs, not standalone proof that the project is production-ready.

01
Codex generated assets reference unsupported AskUserQuestion/TodoWrite/T
github / github_issue
02
Incomplete artifacts marked as "done" after workflow interruption
github / github_issue
03
/opsx:apply suggests openspec-continue-change which is not installed on
github / github_issue
04
Feedback: Deep verification test - PUA mode v3 active
github / github_issue
05
Protect OpenSpec from AI slop PRs
github / github_issue
06
open:sync messed up my spec.md files
github / github_issue
07
Support schema extension or partial overrides to avoid full shadowing of
github / github_issue
08
[Feature Request/Suggestion] Extension to package for custom schemas, as
github / github_issue
09
First steps don't work
github / github_issue
10
OpenCode sync missing
github / github_issue
11
v1.3.1 - Path & Telemetry Fixes
github / github_release
12
v1.1.0 - Cross-Platform Fixes, Nix Improvements
GitHub / issue

How to start

Only source-backed commands are shown here. Verify them in an isolated environment first.

Try the prompt first

Test the workflow without installing the upstream project.

preview

Read the Human Manual

Understand inputs, outputs, limits, and failure modes.

manual

Take context to your AI host

Use the compiled assets in your preferred AI environment.

context

Run sandbox verification

Confirm install commands and rollback before using a primary environment.

verify

npm install -g @fission-ai/openspec@latest

Official start command · https://github.com/Fission-AI/OpenSpec#readme · verified: yes

Human Manual

The English page must expose the real manual, not a short placeholder.

8+ sections · Human Manual

OpenSpec Manual

OpenSpec uses an artifact-guided workflow where changes are organized into structured folders. The system tracks dependencies between artifacts and automatically manages state transitions.

Open the full manual

OpenSpec Human Manual
Table of Contents
Introduction to OpenSpec
Related Pages
Purpose and Scope
Core Features
Architecture Overview
The Change Structure

Introduction to OpenSpec

Related topics: Getting Started, System Architecture

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

Getting Started

Related topics: Introduction to OpenSpec, Slash Commands

Sources: [README.md:1]()

System Architecture

Related topics: Introduction to OpenSpec, Artifact Graph System, Workflows

Sources: [openspec/changes/archive/2025-08-06-add-init-command/design.md:1-50]()

Slash Commands

Related topics: Workflows, Getting Started, Supported AI Tools

Sources: [openspec/changes/archive/2025-09-29-add-slash-command-support/proposal.md:1-20]()

Workflows

Related topics: Slash Commands, Artifact Graph System

Sources: [README.md](https://github.com/Fission-AI/OpenSpec/blob/main/README.md)

AI Context Pack and portable assets

After deciding to continue, take the project context into your own AI host.

Complete pack plus user-owned assets

These files are planning and verification assets for Claude Code, Codex, Gemini, Cursor, ChatGPT, and other AI hosts.

Download complete pack Read Human Manual

BundleComplete Project Pack AssetAI Context Pack AssetBoundary & Risk Card AssetHuman Manual AssetPitfall Log AssetPrompt Preview AssetQuick Start ManifestPROJECT_PACK.json

Preflight checks

Treat this page as a planning asset, not proof that your local environment is ready.

The manual is generated from source-linked project files and Doramagic validation signals.
Community evidence warnings stay visible instead of being converted into marketing claims.
This English page is indexable because the locale quality gate passed and explicit English index approval is enabled.
Use the upstream repository as the final authority for installation commands, license, and version-specific behavior.