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* fix(#2615): document the effortSurface axis in the host-integration matrix #2481 added `effortSurface` as the ninth negotiated `hostIntegration` axis and wrote documentation-sourced values into 18 descriptors, but never touched `docs/reference/host-integration-capability-matrix.md`. The matrix that ADR-1239 designates the cited source of truth had zero occurrences of the axis: no entry in the axes legend, and no row in any of the per-runtime tables. `src/host-integration.cts` states "every value is documented or explicitly 'undocumented'" — for this axis that was false for every runtime. Adds the legend entry (the `argv` / `none` / `undocumented` vocabulary, plus why there is deliberately no config-file member) and an `effortSurface` row to all 19 per-runtime tables. Every citation is carried over from #2481's own commit message, where the values were sourced: - claude argv -- `claude --help` documents `--effort <level>` - opencode argv -- `opencode run --help` documents `--variant` - codex argv -- `model_reasoning_effort` is a config.toml key, not a dedicated flag, so the generic `-c key=value` override is the only argv route (still argv) - 15 hosts undocumented -- their docs state no reasoning setting kimi-code is the nineteenth section (added by #2603 after #2481) and is the one runtime with no declared value. Its row and a Documentation-gaps entry record why rather than inventing one: Kimi Code documents `/effort` (alias `/thinking`), but only as an INTERACTIVE slash command — `-m, --model` is the only model-adjacent argv. Neither vocabulary member is accurate (`none` would deny a mechanism the host has, `argv` would claim one it does not expose), so closing that gap needs a vocabulary decision, which is a negotiation change and not a documentation one. The absent value already degrades closed exactly as the sentinel does. The regression test derives its runtime list from the registry rather than hardcoding it, so a runtime added later fails until its matrix row exists — the ratchet whose absence let #2481 add an axis with nothing catching the missing docs. Closes #2615 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QT3ibz5qJuDuGqpTGRYVGf * docs(#2615): honest citations for the undocumented rows; fix the four stale 8-axis lists Two findings from the orthogonal review of the first commit. 1. The 15 `undocumented` rows shared byte-identical text — "searched the runtime's official docs (see Sources consulted above)" — which is weaker than this file's own convention ("no authoritative doc — searched: <url>") and, worse, implies a per-host targeted search that did not happen: each section's Sources-consulted list was gathered for OTHER axes and contains no CLI-reference or reasoning-effort source. The rows now say plainly what the finding is — an ABSENCE established by #2481's cross-host survey — and cite that survey rather than implying a URL was checked per host. 2. Four normative docs still described "the eight negotiated axes" and omitted effortSurface entirely. The worst of them is docs/how-to/add-or-update-a-host-integration.md — the maintainer's own guide for onboarding a host, whose Step 2 axis table would have a maintainer reproduce exactly the gap #2615 exists to close. Also fixed: docs/reference/host-integration-interface.md (which calls itself the normative reference and had no effortSurface row at all), docs/how-to/author-a-host-plugin.md, docs/registries/README.md ("**exactly** the eight … axes keys"), and CONTEXT.md's matching EoS-registry sentence. Deliberately NOT changed, because they are historical records rather than current contract: docs/whats-new-1.7.0.md and docs/FEATURES.md's 1.7.0 entry (effortSurface shipped in 1.8.0 via #2481 — rewriting them would falsify the release history), ADR-1239's pre-amendment body (already superseded by its own "Amendment (2026-07-21): effortSurface axis (#2481)"), and ADR-1016's "original eight axes", which refers to a different axis set entirely. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QT3ibz5qJuDuGqpTGRYVGf * chore(#2615): backfill changeset PR number (#2698) --------- Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
GSD Core documentation
Documentation is organised into four quadrants: tutorials help you learn by doing, how-to guides solve specific tasks, reference states authoritative facts, and explanation explores concepts and design decisions.
Language versions: English · Português (pt-BR) · 日本語 · 简体中文
Tutorials
- Your first project — install to first shipped phase, one guaranteed path
- Onboarding an existing codebase — bring GSD Core to a brownfield repo
- Build your first capability — author a tiny declarative capability and watch it act in the loop
- Install your first capability — install a third-party capability end-to-end: consent, verify, check for updates, remove
How-to guides
- Install on your runtime — runtime-specific install steps for all 16 supported runtimes
- Install a minimal GSD and add skills later — install only the core skills, then grow the surface with profiles and
/gsd:surface - Attach a plugin-provided skill to a GSD agent — use the
global:plugin:skillentry form to load Claude Code plugin skills into agent prompts - Discuss a phase — capture implementation decisions before planning begins
- Resolve edge-coverage findings — turn the spec phase's surfaced domain-boundary edges into covered, dismissed, or backstopped spec decisions
- Resolve prohibition findings — turn the spec phase's surfaced must-NOT constraints into resolved, dismissed, or deferred spec decisions
- Plan a phase — run research, decompose work, and verify plan quality
- Execute a phase — run plans in parallel waves with fresh-context subagents
- Verify and ship — walk through completed work, diagnose failures, and create the PR
- Run phases autonomously — use autonomous mode for unattended phase execution
- Handle quick and fast tasks — use
/gsd-quickand/gsd-fastfor ad-hoc work outside the phase loop - Configure model profiles — switch between quality, balanced, and budget model tiers
- Set up cross-AI review — configure a second AI to review code produced by the primary agent
- Work in parallel with workstreams — run independent lines of work simultaneously using workstreams
- Isolate work with workspaces — use workspaces to sandbox experimental or risky changes
- Debug a failed execution — diagnose and recover from broken or incomplete phase execution
- Spike and sketch — use
/gsd-spikeand/gsd-sketchfor exploratory work before committing to a plan - Design a UI phase — use the UI phase loop for frontend and visual work
- Develop a Capability for GSD 1.5+ — add feature Capabilities, hook fragments, and registry entries
- Add or update a host's integration — set a host's documentation-sourced
runtime.hostIntegrationaxes (ADR-1239 Phase A), with theundocumentedsentinel rule - Turn a capability off (and keep it off) — disable a capability via the surface, or gate individual hooks off without removing the capability
- Drive GSD from a tracker issue — start a phase from a GitHub, Linear, or Jira issue
- Migrate from GSD 2 — upgrade an existing GSD 2 project to GSD Core
- Update GSD — re-run the installer to pick up the latest release
- Clean up get-shit-done-cc — remove leftover old-package artifacts that cause a spurious
⬆ /gsd:updateindicator after migrating to@opengsd/gsd-core - Fix the worktree base-mismatch (exit 42) error — resolve the branch-divergence condition that halts parallel phase execution
- Recover and troubleshoot — fix common problems, rebuild context, and uninstall
Reference
- Commands — every command with flags and examples
- Configuration — full config schema, model profiles, git branching strategies
- CLI tools —
gsd-tools.cjsprogrammatic API for workflows and agents - Features — complete feature index
- Inventory — installed skills and surface map
- STATE.md schema — field-by-field reference for
.planning/STATE.md - CONTEXT.md schema — field-by-field reference for
.planning/phases/<N>/CONTEXT.md - PLAN.md schema — field-by-field reference for
.planning/phases/<N>/PLAN.md - Planning artifacts — all
.planning/files and their roles - Review and verification capabilities — code review, security, and Nyquist capability ownership and hook contracts
- Capability matrix — generated catalogue of every capability's role, tier, extension points, hook kinds, and
engines.gsd - Capability manifest — the full
capability.jsonschema and validation rules gsd capabilitycommand — install / update / remove / list reference for third-party capabilities
Explanation
- Context engineering — how context rot forms and how GSD Core prevents it
- The phase loop — design rationale for the Discuss → Plan → Execute → Verify → Ship cycle
- Multi-agent orchestration — how subagents are spawned, scoped, and coordinated
- Security model — trust boundaries, permissions, and safe automation
- The capability trust model — why third-party capabilities are gated by consent + integrity + reversibility, not a sandbox
- How overlay capabilities compose — why first-party always wins and how the loader resolves precedence, conflicts, and fail-open load-failure warnings
- Architecture — system architecture, agent model, and data flow
- The Embeddable Orchestration System — one public, versioned contract for embedding GSD across many hosts
- Discuss modes — assumptions mode vs interview mode for
/gsd-discuss-phase - Context monitoring — context window monitoring hook architecture
- Issue-driven orchestration — recipe for driving GSD from a tracker issue using existing primitives
Related
- What's new in 1.7.0 — curated highlights of the 1.7.0 release
- Root README — landing page, quickstart, and documentation overview
- Changelog — release history