Stage

Stage is a code review tool that reorganizes local git changes and pull requests into logical, ordered "chapters" so engineers can review and merge changes far faster — a workflow built for teams shipping large volumes of AI-generated code. Stage ships an open-source (MIT) command-line tool, "stagereview", that runs entirely on the developer's machine and works with any AI coding agent (Claude Code, Cursor, Codex, Gemini, opencode): it diffs the current branch or a GitHub PR, clusters the hunks into narrated chapters with a prologue, and opens them in a local browser SPA for review. The full hosted Stage experience lives at stagereview.app. Stage is a Y Combinator (Spring 2026) company founded by Charles Pan and Dean Stratakos.

Stage is profiled on the APIs.io network. Tagged areas include Company, Code Review, Developer Tools, CLI, and AI Coding Agents.

Stage’s developer surface includes documentation, engineering blog, support, code examples, CLI, and 9 more developer resources.

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9.4/100 minimal ▬ flat Agent 5/100 human only Front door AI 3/6 light Heartbeat 70/100 alive self hosted · MIT Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs 1 Agent Skills

Company Code Review Developer Tools CLI AI Coding Agents Pull Requests Version Control Software Development

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 9.4/100 · minimal

Contract Quality 1.2 / 19

Developer Ergonomics 3.9 / 15

Access Clarity 0.0 / 15

Operational Transparency 0.3 / 10

Contract Governance 0.0 / 9

Discoverability 3.6 / 8

Regulatory Posture 0.9 / 15

Open Source Surface 0.0 / 10

Agent readiness — 5/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 75 points between them, because both conditional facets apply and carry 25 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

11 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 6.5 — up to +23.4 composite points
Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 26.2 — up to +14.8 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/stage/apis.yml: open an issue on github.com/api-evangelist/stage to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Agent Skills (SKILL.md packages)	undeclared	-	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Agent Skills

measured — observed by APIs.io (published)

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

stage-chapters

AGENT SKILL

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Stage Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

Examples

CLI

Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 3

The organization behind the API

Website

Website

Blog

Blog

Twitter

Twitter

Source (apis.yml)

aid: stage
name: Stage
description: 'Stage is a code review tool that reorganizes local git changes and pull requests into logical, ordered "chapters"
  so engineers can review and merge changes far faster — a workflow built for teams shipping large volumes of AI-generated
  code. Stage ships an open-source (MIT) command-line tool, "stagereview", that runs entirely on the developer''s machine
  and works with any AI coding agent (Claude Code, Cursor, Codex, Gemini, opencode): it diffs the current branch or a GitHub
  PR, clusters the hunks into narrated chapters with a prologue, and opens them in a local browser SPA for review. The full
  hosted Stage experience lives at stagereview.app. Stage is a Y Combinator (Spring 2026) company founded by Charles Pan and
  Dean Stratakos.'
url: https://raw.githubusercontent.com/api-evangelist/stage/refs/heads/main/apis.yml
deliveryModel:
  model: self-hosted
  license: MIT
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://raw.githubusercontent.com/ReviewStage/stage-cli/main/assets/stage-mark.svg
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Code Review
- Developer Tools
- CLI
- AI Coding Agents
- Pull Requests
- Version Control
- Software Development
tags_raw:
- Company
- Code Review
- Developer Tools
- CLI
- AI Coding Agents
- Pull Requests
- Git
- Software Development
apis: []
common:
- type: IssueTracker
  url: https://github.com/ReviewStage/stage-cli/issues
- type: License
  name: MIT
  url: https://github.com/ReviewStage/stage-cli/blob/main/LICENSE
- type: DomainSecurity
  url: security/stage-domain-security.yml
- type: Website
  url: https://stagereview.app/
- type: Documentation
  url: https://github.com/ReviewStage/stage-cli#readme
- type: Blog
  url: https://stagereview.app/blog
- type: GitHubOrganization
  url: https://github.com/ReviewStage
- type: SourceCode
  url: https://github.com/ReviewStage/stage-cli
- type: Support
  url: https://discord.gg/kfEa6a4wTp
- type: Examples
  url: https://stagereview.app/explore
- type: Twitter
  url: https://x.com/StageReviewApp
- type: CLI
  name: Stage CLI (stagereview)
  url: cli/stage-cli.yml
- type: Packages
  name: Stage npm package
  url: packages/stage-packages.yml
- type: AgentSkill
  name: stage-chapters skill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 5
  pass: local-v1

Work with this as data

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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