Package Exports

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Readme

`</>` Delimit

One workspace for every AI coding assistant. Switch models, not context.

Your tasks, memory, and governance carry between Claude Code, Codex, and Gemini CLI. Persistent ledger, API breaking change detection, security audit, multi-model deliberation — all shared across assistants.

GitHub Action

Add to any repo with an OpenAPI spec:

name: API Contract Check
on: pull_request

jobs:
  delimit:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: delimit-ai/delimit-action@v1
        with:
          spec: api/openapi.yaml

That's it. Delimit auto-fetches the base branch spec, diffs it, and posts a PR comment with:

Breaking changes with severity badges
Semver classification (major/minor/patch)
Step-by-step migration guide
Policy violations

View on GitHub Marketplace → · See a live demo (6 breaking changes) →

Example PR comment

Breaking Changes Detected

Change Path Severity

endpoint_removed DELETE /pets/{petId} error

type_changed /pets:GET:200[].id (string → integer) warning

enum_value_removed /pets:GET:200[].status warning

Semver: MAJOR (1.0.0 → 2.0.0)

Migration Guide: 3 steps to update your integration

Change	Path	Severity
endpoint_removed	`DELETE /pets/{petId}`	error
type_changed	`/pets:GET:200[].id` (string → integer)	warning
enum_value_removed	`/pets:GET:200[].status`	warning

CLI + MCP Toolkit

Governance tools for AI coding assistants (Claude Code, Codex, Cursor, Gemini CLI):

npx delimit-cli setup

No API keys. No account. Installs in 10 seconds.

CLI commands

npx delimit-cli lint api/openapi.yaml           # Check for breaking changes
npx delimit-cli diff old.yaml new.yaml           # Compare two specs
npx delimit-cli explain old.yaml new.yaml        # Generate migration guide
npx delimit-cli init --preset strict             # Initialize policies
npx delimit-cli doctor                           # Check setup health

What the MCP toolkit adds

When installed into your AI coding assistant, Delimit provides:

API governance -- lint, diff, policy enforcement, semver classification
Test verification -- confirms tests actually ran, measures coverage
Security audit -- scans dependencies, detects secrets and anti-patterns
Persistent ledger -- tracks tasks across sessions, auto-creates items from governance
Multi-model consensus -- Grok, Gemini, and Codex debate until they agree
Zero-spec extraction -- generate OpenAPI specs from FastAPI, Express, or NestJS source

What it catches

10 categories of breaking changes:

Change	Example
Endpoint removed	`DELETE /users/{id}` disappeared
HTTP method removed	`PATCH /orders` no longer exists
Required parameter added	New required header on `GET /items`
Field removed from response	`email` dropped from user object
Type changed	`id` went from string to integer
Enum value removed	`status: "pending"` no longer valid
Response code removed	`200 OK` response dropped
Parameter removed	`sort` query param removed
Required field added to request	Body now requires `tenant_id`
Format changed	`date-time` changed to `date`

Detection is deterministic — rules, not AI inference. Same input always produces the same result.

Policy presets

npx delimit-cli init --preset strict    # All violations are errors
npx delimit-cli init --preset default   # Balanced (default)
npx delimit-cli init --preset relaxed   # All violations are warnings

Or write custom rules in .delimit/policies.yml:

rules:
  - id: freeze_v1
    name: Freeze V1 API
    change_types: [endpoint_removed, method_removed, field_removed]
    severity: error
    action: forbid
    conditions:
      path_pattern: "^/v1/.*"
    message: "V1 API is frozen. Changes must be made in V2."

Supported formats

OpenAPI 3.0 and 3.1
Swagger 2.0
YAML and JSON

delimit-cli