From sdd
Generates changes index and product snapshot Markdown files from spec files, validates spec frontmatter. For maintaining spec registries in monorepos.
npx claudepluginhub liorcohen/sdd --plugin sddThis skill uses the workspace's default tool permissions.
The spec commands are available via the system CLI:
Provides templates, schemas, validation, and Git workflow guidelines for product and tech SPEC.md files with acceptance criteria.
Searches, retrieves, and installs Agent Skills from prompts.chat registry using MCP tools like search_skills and get_skill. Activates for finding skills, browsing catalogs, or extending Claude.
Checks Next.js compilation errors using a running Turbopack dev server after code edits. Fixes actionable issues before reporting complete. Replaces `next build`.
Share bugs, ideas, or general feedback.
The spec commands are available via the system CLI:
Generates changes/INDEX.md from all change spec files.
<plugin-root>/system/system-run.sh spec index --changes-dir changes/
Generates specs/SNAPSHOT.md compiling all active specs.
<plugin-root>/system/system-run.sh spec snapshot --specs-dir specs/
Validates spec frontmatter and format.
# Validate single spec
<plugin-root>/system/system-run.sh spec validate changes/2026/01/21/my-change/SPEC.md
# Validate all specs
<plugin-root>/system/system-run.sh spec validate --all --specs-dir specs/
The index is a registry of all change specs, located at changes/INDEX.md:
# Change Index
Last updated: YYYY-MM-DD
Total: X specs (Active: Y, Deprecated: Z, Archived: W)
## Active Changes
| Change | Type | Spec | Domain | Issue | Since |
|--------|------|------|--------|-------|-------|
| User Authentication | feature | [SPEC](2025/01/01/user-auth/SPEC.md) | Identity | [PROJ-123](url) | 2025-01-01 |
## Deprecated
| Change | Type | Spec | Domain | Issue | Deprecated |
|--------|------|------|--------|-------|------------|
| Old Auth | feature | [SPEC](2025/01/15/old-auth/SPEC.md) | Identity | [PROJ-100](url) | 2025-02-01 |
## Archived
*None*
Note: Links are relative within the changes/ directory (e.g., YYYY/MM/DD/...).
The snapshot is a compiled view of current product state:
# Product Snapshot
Generated: YYYY-MM-DD
This document represents the current active state of the product by compiling all active specifications.
## By Domain
### Identity
#### User Authentication
**Spec:** [changes/2025/01/01/user-auth/SPEC.md](changes/2025/01/01/user-auth/SPEC.md)
**Issue:** [PROJ-123](url)
[Summary of change capabilities]
---
### Billing
...
Schema: schemas/input.schema.json
Accepts index command and directory paths for changes and specs.
Schema: schemas/output.schema.json
Returns success status and any validation errors or warnings.
<plugin-root>/system/system-run.sh spec index to update INDEX.md<plugin-root>/system/system-run.sh spec snapshot to update SNAPSHOT.md<plugin-root>/system/system-run.sh spec validate --all to ensure all specs are valid