Guides
Sync & advise
The start-of-session sync call, what it returns, how to present it — and advise, which proposes setup changes for your harness.
Sync — once per session
codexguild_sync (MCP) / POST /agents/me/sync (REST) answers one question: what changed that matters to this project since I last looked?
curl -s -X POST https://api.codexguild.com/v1/agents/me/sync \
-H "Authorization: Bearer $CODEXGUILD_API_KEY" -H "content-type: application/json" \
-d '{
"stack": [{"name":"next","version":"15.3.0"},{"name":"@prisma/client","version":"6.19.0"}],
"installedSkills": ["frontend-design","mcp-builder"]
}'| Field | Type | Notes |
|---|---|---|
stack | {name, version?, ecosystem?}[] (≤300) | Dependency names and versions only. ecosystem is npm (default), pypi, go or cargo — send pypi for Python packages so PyPI openai gets the Python SDK's releases, not the npm one's. Omit stack to reuse the last reported one. |
installedSkills | string[] (≤500) | Names of skills in your skills folders. |
since | ISO date or datetime | Defaults to your last sync; 30 days on the first one. Implies a refresh. |
force | boolean | Full refresh now, regardless of the refresh frequency (before a dependency upgrade, or when you ask). |
Refresh frequency
Call sync at the start of every session. You choose per agent, in the dashboard (Agents → Refresh), how often it
gets a full refresh: every session, daily (default), weekly, every 15 days or monthly. Between refreshes sync answers
"mode": "up_to_date" with nextRefreshAt and only urgent items — new security advisories and installed skills the
scanner now flags — so it costs a few tokens and no freshness quota. A new dependency in stack, since or force
triggers a refresh early. Independently, the dashboard Alerts inbox gets new advisories, breaking releases and
flagged skills that match your agents' stacks within the hour.
Package names are normalized to topics: next → nextjs, @nestjs/core → nestjs, @prisma/client → prisma.
Response
{
"syncedAt": "2026-09-29T08:00:00.000Z",
"since": "2026-08-30T08:00:00.000Z",
"firstSync": false,
"stack": { "deps": 42, "trackedTopics": ["nextjs", "prisma"], "untrackedTopics": ["zod"] },
"freshness": [{
"topic": "nextjs", "yourVersion": "15.3.0", "total": 12, "breaking": 1,
"changes": [{ "title": "v16.0.0", "versionTag": "v16.0.0", "breaking": true, "asOf": "…", "url": "…" }]
}],
"security": {
"installedSkills": [{ "slug": "…", "name": "mcp-builder", "securityStatus": "passed", "counts": {}, "stale": false }],
"unknownSkills": ["my-private-skill"],
"advisories": [{ "slug": "…", "title": "…", "summaryMd": "…", "asOfDate": "…" }]
},
"kb": [{ "slug": "…", "title": "…", "asOfDate": "…" }],
"recommendedSkills": [{ "slug": "…", "name": "…", "category": "frontend", "matches": ["nextjs"], "installCommand": "…" }]
}How your agent should present it
Keep it short and actionable:
- Possibly-breaking releases for the project's stack, with
yourVersionso the user can tell "patch for my line" from "next major". - Installed skills that are
flaggedorwarn, orstale(its source repository has had no commits for roughly ten months or more — likely unmaintained). - New advisories for coding agents.
- Recommendations only if the user asks — never install automatically.
Tip: unknownSkills are skills CodexGuild has never seen (private or local). Run codexguild_scan_skills from the local MCP server to audit them offline.
Sync counts as one freshness call against your daily quota.
Advise — set the agent up
codexguild_advise / POST /agents/me/advise returns proposals, never changes:
curl -s -X POST https://api.codexguild.com/v1/agents/me/advise \
-H "Authorization: Bearer $CODEXGUILD_API_KEY" -H "content-type: application/json" \
-d '{"harness":"claude-code","existingInstructionFiles":["CLAUDE.md"]}'{
"approvalRequired": true,
"howToApply": ["…"],
"proposals": [
{ "kind": "mcp-server", "file": ".mcp.json", "snippet": "…", "cli": "claude mcp add …" },
{ "kind": "skill-install", "skill": "codexguild", "targetDir": "~/.claude/skills", "command": "…" },
{ "kind": "instructions-block", "file": "CLAUDE.md", "begin": "<!-- codexguild:begin v1 …", "end": "<!-- codexguild:end -->", "content": "…" }
]
}| Proposal | What applying it means |
|---|---|
mcp-server | add the CodexGuild server to the harness's MCP config |
skill-install | the codexguild skill, plus scan-passed skills that match the stack |
instructions-block | a marked section for the instruction file your harness actually loads |
Warning: Your agent must show each proposal to the user and apply only the approved ones. instructions-block replaces only the text between the markers; if the markers are missing it appends at the end. Identity files (SOUL.md, IDENTITY.md, USER.md, MEMORY.md) are never targets.