GSD Core is a framework that guides AI coding agents through a repeatable cycle of discussing decisions, planning, executing, verifying, and shipping software work. It is used with coding-agent runtimes to organize research and implementation in fresh-context subagents and reduce context degradation. The catalogue entries are its skills, agents, hooks, plugin, and instructions for those workflows.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add open-gsd/gsd-core --skill gsd-complete-milestonegit clone --depth 1 https://github.com/open-gsd/gsd-coreWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/open-gsd/gsd-core/gsd-complete-milestone)<a href="https://agentmods.dev/skills/open-gsd/gsd-core/gsd-complete-milestone"><img src="https://agentmods.dev/badge/skills/open-gsd/gsd-core/gsd-complete-milestone/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/open-gsd/gsd-core/gsd-complete-milestone"><img src="https://agentmods.dev/badge/skills/open-gsd/gsd-core/gsd-complete-milestone.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 7 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00016 | $0.01209 |
| Opus 5 | $0.00008 | $0.00605 |
| Sonnet 5 | $0.00003 | $0.00242 |
| Haiku 4.5 | $0.00002 | $0.00121 |
Grade A, and why
gsd-complete-milestone scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
3 near-identical copies found in the catalogue:
- mindforge-complete-milestone — 89% identical, 34 lines differ
- gsd-complete-milestone — 88% identical, 37 lines differ
- ferrox-complete-milestone — 83% identical, 23 lines differ
How it starts
The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Purpose: Create historical record of shipped version, archive milestone artifacts (roadmap + requirements), and prepare for next milestone. Output: Milestone archived (roadmap + requirements), PROJECT.md evolved, git tagged.
<execution_context> Load these files NOW (before proceeding):
- @~/.claude/gsd-core/workflows/complete-milestone.md (main workflow)
- @~/.claude/gsd-core/templates/milestone-archive.md (archive template) </execution_context>
User input:
- Version: {{version}} (e.g., "1.0", "1.1", "2.0")
Follow complete-milestone.md workflow:
-
Check for audit:
- Look for
.planning/v{{version}}-MILESTONE-AUDIT.md - If missing or stale: recommend
/gsd-audit-milestonefirst - If audit status is
gaps_found: recommend closing the gaps inline (the audit output already enumerates them — insert closure phases via/gsd-phase --insert <N>plus the standard discuss/plan/execute chain) before proceeding. - If audit status is
passed: proceed to step 1
## Pre-flight Check {If no v{{version}}-MILESTONE-AUDIT.md:} ⚠ No milestone audit found. Run `/gsd-audit-milestone` first to verify requirements coverage, cross-phase integration, and E2E flows. {If audit has gaps:} ⚠ Milestone audit found gaps. The audit output already enumerates the unsatisfied requirements, cross-phase issues, and broken flows — insert a closure phase per gap with `/gsd-phase --insert <N>` and run the standard `/gsd-discuss-phase` → `/gsd-plan-phase` → `/gsd-execute-phase` chain. Or proceed anyway to accept the gaps as tech debt. {If audit passed:} ✓ Milestone audit passed. Proceeding with completion. - Look for
-
Verify readiness:
- Check all phases in milestone have completed plans (SUMMARY.md exists)
- Present milestone scope and stats
- Wait for confirmation
-
Gather stats:
- Count phases, plans, tasks
- Calculate git range, file changes, LOC
- Extract timeline from git log
- Present summary, confirm
-
Extract accomplishments:
- Read all phase SUMMARY.md files in milestone range
- Extract 4-6 key accomplishments
- Present for approval
-
Archive milestone:
- Create
.planning/milestones/v{{version}}-ROADMAP.md - Extract full phase details from ROADMAP.md
- Fill milestone-archive.md template
- Update ROADMAP.md to one-line summary with link
- Create
-
Archive requirements:
- Create
.planning/milestones/v{{version}}-REQUIREMENTS.md - Mark all v1 requirements as complete (checkboxes checked)
- Note requirement outcomes (validated, adjusted, dropped)
- Delete
.planning/REQUIREMENTS.md(fresh one created for next milestone)
- Create
-
Update PROJECT.md:
- Add "Current State" section with shipped version
- Add "Next Milestone Goals" section
- Archive previous content in
<details>(if v1.1+)
-
Commit and tag:
- Stage: MILESTONES.md, PROJECT.md, ROADMAP.md, STATE.md, archive files
- Commit:
chore: archive v{{version}} milestone - Tag:
git tag -a v{{version}} -m "[milestone summary]" - Ask about pushing tag
-
Offer next steps:
/gsd-new-milestone— start next milestone (questioning → research → requirements → roadmap)
<success_criteria>
- Milestone archived to
.planning/milestones/v{{version}}-ROADMAP.md - Requirements archived to
.planning/milestones/v{{version}}-REQUIREMENTS.md .planning/REQUIREMENTS.mddeleted (fresh for next milestone)- ROADMAP.md collapsed to one-line entry
- PROJECT.md updated with current state
- Git tag v{{version}} created (if
git.create_tagenabled) - Commit successful
- User knows next steps (including need for fresh requirements) </success_criteria>
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago Changed · +1 lines 9309e79460af
- 9d ago First seen · 143 lines · 16 tokens per session scan A d7f6202222d1
gsd-complete-milestone is a skill published in the GitHub repository open-gsd/gsd-core (9,217 stars, last pushed yesterday), licensed MIT. It adds 16 tokens to every session and 1,209 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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