7ca8011cd9
* refactor(#1373): add markdown-sectionizer seam (ADR-1372 T0) Establishes the canonical markdown-structure parsing seam per ADR-1372. No existing parsers are modified; this is the foundational T0 tier only. - docs/adr/1372-markdown-sectionizer-seam.md: Accepted ADR defining the seam interface, the tiered migration plan (T0-T7), and the prohibition enforcement approach (no-adhoc-markdown-parsing ESLint rule in T7). - src/markdown-sectionizer.cts: Pure module, Node built-ins only. Exports: stripFencedCode (CommonMark-correct state machine ported from uat-predicate.cts _stripFencedBlocks, CRLF-safe, unterminatedFence signal), tokenizeHeadings (ATX headings outside fenced blocks), collectSections (line-by-line predicate-driven section collection), collectSection (single named section, levelBounded stop, optional stripFences), iterateBullets (dash/checkbox/numbered + continuation). - tests/markdown-sectionizer.test.cjs: 54-test behavioral suite covering the parser QA matrix (LF/CRLF, Unicode headings, headings-inside-fences, unterminated fences, nested levels, all bullet markers, continuation lines, empty/non-string input) plus 4 fast-check property tests (idempotence, output shape, never-throws, length monotonicity). - CONTEXT.md: Markdown Sectionizer glossary entry added (PR review gate). Tests: 54 pass, 0 fail. Existing adr-parser + uat-passed tests: 22 pass. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * refactor(#1373): add extractTaggedBlocks + replaceSection to seam; register inventory - src/markdown-sectionizer.cts: extend Section type with bodyStart/bodyEnd offsets; add extractTaggedBlocks(content, tagName) (inner text of <tag>…</tag> blocks, tagName regex-escaped, caller decides fence-stripping) and replaceSection(content, section, newBody) (pure character-offset splice for read-modify-write callers); update collectSections/collectSection to populate bodyStart/bodyEnd. - tests/markdown-sectionizer.test.cjs: add 33 new behavioral tests for extractTaggedBlocks, replaceSection, and a DEFECT.GENERATIVE-FIX parity guard that asserts stripFencedCode and uat-predicate's _stripFencedBlocks agree on a shared 9-item corpus; documents the known 4-space-indent divergence. - docs/adr/1372-markdown-sectionizer-seam.md: list extractTaggedBlocks and replaceSection in §"The seam". - CONTEXT.md: update ### Markdown Sectionizer glossary entry with the two new exports. - docs/INVENTORY.md: add markdown-sectionizer.cjs row (alphabetically between loop-resolver and milestone). - docs/INVENTORY-MANIFEST.json: regenerated via gen-inventory-manifest --write. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * fix(#1373): clear no-unsafe-assignment + unused-var lint in markdown-sectionizer Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * fix(#1373): correct section offset/round-trip + CommonMark heading/fence edges; register eslint coverage FIX 1 (CRITICAL): Enforce content.slice(bodyStart,bodyEnd) === body invariant in both collectSection and collectSections. bodyEnd is now bodyStart + body.length instead of the raw stop-line offset, eliminating the trailing-newline overcounting that caused replaceSection to drop separator newlines (## A\nbody## B gluing bug). FIX 2 (MED): tokenizeHeadings now accepts ≤3-space indent (CommonMark §4.5) and empty ATX headings (## / ## ), text=''. 4-space indent correctly excluded. FIX 3 (MED): collectSection gains stopAtLevel option — stops at the next heading whose level ≤ stopAtLevel, independent of the opener's level. Enables state.cts ## sections that also stop at ### without abusing levelBounded. FIX 4 (MED): Backtick fence opener info string must not contain a backtick (CommonMark). Applied in both stripFencedCode and tokenizeHeadings fence state machines. Tilde fences unaffected. FIX 5 (LOW): "byte offset" → "character (string-index) offset" in HeadingToken / Section doc comments. FIX 6 (LOW): extractTaggedBlocks doc comment documents nested-tag non-support; test locks the non-greedy close-at-first-</tag> behavior. FIX 7: Add gsd-core/bin/lib/markdown-sectionizer.cjs to eslint.config.mjs ignores so tests/551-eslint-bin-lib-coverage.test.cjs passes (3/3). Tests: 107 pass / 0 fail (was 87; +20 new tests for FIX 1–4, 6). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * fix(#1373): gitignore tsc-built markdown-sectionizer.cjs (ADR-457 build-at-publish) The seam's compiled artifact must be a build-at-publish output like every other src/*.cts->bin/lib/*.cjs module (decisions, core, state, ...), not a committed file. Add it to the ADR-457 ignore list and untrack it; build:lib/CI regenerate it. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> --------- Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
GSD Core
Git. Ship. Done.
English · Português · 简体中文 · 日本語 · 한국어
A light-weight meta-prompting, context engineering, and spec-driven development system for Claude Code, OpenCode, Gemini CLI, Kimi CLI, Kilo, Codex, Copilot, Cursor, Windsurf, and more.
What is GSD Core
GSD Core is a context-engineering and spec-driven development framework that drives AI coding agents (Claude Code, Codex, Gemini CLI, Kimi CLI, Copilot, Cursor, and more) through a disciplined phase loop. It solves context rot — the quality degradation that accumulates as an AI fills its context window — by running all heavy research, planning, and execution work in fresh-context subagents while keeping your main session lean.
How it works
Each milestone repeats the same five-step loop, one phase at a time:
- Discuss — capture implementation decisions before anything is planned
- Plan — research, decompose, and verify the plan fits a fresh context window
- Execute — run plans in parallel waves; each executor starts with a clean 200k-token context
- Verify — walk through what was built; diagnose and fix before declaring done
- Ship — create the PR, archive the phase, repeat for the next one
Quickstart
npx @opengsd/gsd-core@latest
The installer prompts for your runtime (Claude Code, OpenCode, Gemini CLI, Kimi CLI, Kilo, Codex, Copilot, Cursor, Windsurf, and more) and whether to install globally or locally. The installer is required for cross-runtime compatibility — do not copy files from agents/ or commands/ directly.
On another runtime or without Node.js? See Install on your runtime.
Once installed, start your first project:
/gsd-new-project
New here? Follow Your first project for a guided walkthrough from install to first shipped phase.
Documentation
Tutorials — learning by doing:
How-to guides — task-focused recipes:
Reference — authoritative facts:
Explanation — concepts and design decisions:
Full index: docs/README.md. Other languages: 日本語 · 한국어 · Português · 简体中文.
Why it works
Most AI-coding setups fail at scale because context bloat silently degrades output quality, there is no shared memory between sessions, and nothing verifies that code actually works. GSD Core solves all three: heavy work runs in fresh subagents, structured artifacts like STATE.md and CONTEXT.md survive session boundaries, and the verify step walks through what was built and generates fix plans before a phase is declared done. See docs/explanation/context-engineering.md for the full reasoning.
Troubleshooting? See docs/how-to/recover-and-troubleshoot.md.
Community
| Project | Platform |
|---|---|
| gsd-opencode | Original OpenCode port |
| Discord | Community support |
Star History
License
MIT License. See LICENSE for details.
Claude Code is powerful. GSD Core makes it reliable.