feat(skills): add Linear project management skill (#1230)

Comprehensive Linear GraphQL API skill with API key auth (no OAuth needed). Includes all common queries (issues, projects, teams, search, filters) and mutations (create, update, assign, comment, status changes). Addresses user pain point: Linear MCP server OAuth flow is unreliable in headless agent sessions. This skill uses personal API keys which work reliably without browser-based auth flows. Requires: LINEAR_API_KEY env var (personal API key from Linear settings)
2026-03-13 21:20:32 -07:00
parent 938e887b4c
commit 2bf6b7ad1a
1 changed files with 297 additions and 0 deletions
--- a/skills/productivity/linear/SKILL.md
+++ b/skills/productivity/linear/SKILL.md
@@ -0,0 +1,297 @@
+---
+name: linear
+description: Manage Linear issues, projects, and teams via the GraphQL API. Create, update, search, and organize issues. Uses API key auth (no OAuth needed). All operations via curl — no dependencies.
+version: 1.0.0
+author: Hermes Agent
+license: MIT
+prerequisites:
+  env_vars: [LINEAR_API_KEY]
+  commands: [curl]
+metadata:
+  hermes:
+    tags: [Linear, Project Management, Issues, GraphQL, API, Productivity]
+---
+
+# Linear — Issue & Project Management
+
+Manage Linear issues, projects, and teams directly via the GraphQL API using `curl`. No MCP server, no OAuth flow, no extra dependencies.
+
+## Setup
+
+1. Get a personal API key from **Linear Settings > API > Personal API keys**
+2. Set `LINEAR_API_KEY` in your environment (via `hermes setup` or your env config)
+
+## API Basics
+
+- **Endpoint:** `https://api.linear.app/graphql` (POST)
+- **Auth header:** `Authorization: $LINEAR_API_KEY` (no "Bearer" prefix for API keys)
+- **All requests are POST** with `Content-Type: application/json`
+- **Both UUIDs and short identifiers** (e.g., `ENG-123`) work for `issue(id:)`
+
+Base curl pattern:
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ viewer { id name } }"}' | python3 -m json.tool
+```
+
+## Workflow States
+
+Linear uses `WorkflowState` objects with a `type` field. **6 state types:**
+
+| Type | Description |
+|------|-------------|
+| `triage` | Incoming issues needing review |
+| `backlog` | Acknowledged but not yet planned |
+| `unstarted` | Planned/ready but not started |
+| `started` | Actively being worked on |
+| `completed` | Done |
+| `canceled` | Won't do |
+
+Each team has its own named states (e.g., "In Progress" is type `started`). To change an issue's status, you need the `stateId` (UUID) of the target state — query workflow states first.
+
+**Priority values:** 0 = None, 1 = Urgent, 2 = High, 3 = Medium, 4 = Low
+
+## Common Queries
+
+### Get current user
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ viewer { id name email } }"}' | python3 -m json.tool
+```
+
+### List teams
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ teams { nodes { id name key } } }"}' | python3 -m json.tool
+```
+
+### List workflow states for a team
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ workflowStates(filter: { team: { key: { eq: \"ENG\" } } }) { nodes { id name type } } }"}' | python3 -m json.tool
+```
+
+### List issues (first 20)
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ issues(first: 20) { nodes { identifier title priority state { name type } assignee { name } team { key } url } pageInfo { hasNextPage endCursor } } }"}' | python3 -m json.tool
+```
+
+### List my assigned issues
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ viewer { assignedIssues(first: 25) { nodes { identifier title state { name type } priority url } } } }"}' | python3 -m json.tool
+```
+
+### Get a single issue (by identifier like ENG-123)
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ issue(id: \"ENG-123\") { id identifier title description priority state { id name type } assignee { id name } team { key } project { name } labels { nodes { name } } comments { nodes { body user { name } createdAt } } url } }"}' | python3 -m json.tool
+```
+
+### Search issues by text
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ issueSearch(query: \"bug login\", first: 10) { nodes { identifier title state { name } assignee { name } url } } }"}' | python3 -m json.tool
+```
+
+### Filter issues by state type
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ issues(filter: { state: { type: { in: [\"started\"] } } }, first: 20) { nodes { identifier title state { name } assignee { name } } } }"}' | python3 -m json.tool
+```
+
+### Filter by team and assignee
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ issues(filter: { team: { key: { eq: \"ENG\" } }, assignee: { email: { eq: \"user@example.com\" } } }, first: 20) { nodes { identifier title state { name } priority } } }"}' | python3 -m json.tool
+```
+
+### List projects
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ projects(first: 20) { nodes { id name description progress lead { name } teams { nodes { key } } url } } }"}' | python3 -m json.tool
+```
+
+### List team members
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ users { nodes { id name email active } } }"}' | python3 -m json.tool
+```
+
+### List labels
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ issueLabels { nodes { id name color } } }"}' | python3 -m json.tool
+```
+
+## Common Mutations
+
+### Create an issue
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "query": "mutation($input: IssueCreateInput!) { issueCreate(input: $input) { success issue { id identifier title url } } }",
+    "variables": {
+      "input": {
+        "teamId": "TEAM_UUID",
+        "title": "Fix login bug",
+        "description": "Users cannot login with SSO",
+        "priority": 2
+      }
+    }
+  }' | python3 -m json.tool
+```
+
+### Update issue status
+First get the target state UUID from the workflow states query above, then:
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "mutation { issueUpdate(id: \"ENG-123\", input: { stateId: \"STATE_UUID\" }) { success issue { identifier state { name type } } } }"}' | python3 -m json.tool
+```
+
+### Assign an issue
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "mutation { issueUpdate(id: \"ENG-123\", input: { assigneeId: \"USER_UUID\" }) { success issue { identifier assignee { name } } } }"}' | python3 -m json.tool
+```
+
+### Set priority
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "mutation { issueUpdate(id: \"ENG-123\", input: { priority: 1 }) { success issue { identifier priority } } }"}' | python3 -m json.tool
+```
+
+### Add a comment
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "mutation { commentCreate(input: { issueId: \"ISSUE_UUID\", body: \"Investigated. Root cause is X.\" }) { success comment { id body } } }"}' | python3 -m json.tool
+```
+
+### Set due date
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "mutation { issueUpdate(id: \"ENG-123\", input: { dueDate: \"2026-04-01\" }) { success issue { identifier dueDate } } }"}' | python3 -m json.tool
+```
+
+### Add labels to an issue
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "mutation { issueUpdate(id: \"ENG-123\", input: { labelIds: [\"LABEL_UUID_1\", \"LABEL_UUID_2\"] }) { success issue { identifier labels { nodes { name } } } } }"}' | python3 -m json.tool
+```
+
+### Add issue to a project
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "mutation { issueUpdate(id: \"ENG-123\", input: { projectId: \"PROJECT_UUID\" }) { success issue { identifier project { name } } } }"}' | python3 -m json.tool
+```
+
+### Create a project
+```bash
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "query": "mutation($input: ProjectCreateInput!) { projectCreate(input: $input) { success project { id name url } } }",
+    "variables": {
+      "input": {
+        "name": "Q2 Auth Overhaul",
+        "description": "Replace legacy auth with OAuth2 and PKCE",
+        "teamIds": ["TEAM_UUID"]
+      }
+    }
+  }' | python3 -m json.tool
+```
+
+## Pagination
+
+Linear uses Relay-style cursor pagination:
+
+```bash
+# First page
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ issues(first: 20) { nodes { identifier title } pageInfo { hasNextPage endCursor } } }"}' | python3 -m json.tool
+
+# Next page — use endCursor from previous response
+curl -s -X POST https://api.linear.app/graphql \
+  -H "Authorization: $LINEAR_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{"query": "{ issues(first: 20, after: \"CURSOR_FROM_PREVIOUS\") { nodes { identifier title } pageInfo { hasNextPage endCursor } } }"}' | python3 -m json.tool
+```
+
+Default page size: 50. Max: 250. Always use `first: N` to limit results.
+
+## Filtering Reference
+
+Comparators: `eq`, `neq`, `in`, `nin`, `lt`, `lte`, `gt`, `gte`, `contains`, `startsWith`, `containsIgnoreCase`
+
+Combine filters with `or: [...]` for OR logic (default is AND within a filter object).
+
+## Typical Workflow
+
+1. **Query teams** to get team IDs and keys
+2. **Query workflow states** for target team to get state UUIDs
+3. **List or search issues** to find what needs work
+4. **Create issues** with team ID, title, description, priority
+5. **Update status** by setting `stateId` to the target workflow state
+6. **Add comments** to track progress
+7. **Mark complete** by setting `stateId` to the team's "completed" type state
+
+## Rate Limits
+
+- 5,000 requests/hour per API key
+- 3,000,000 complexity points/hour
+- Use `first: N` to limit results and reduce complexity cost
+- Monitor `X-RateLimit-Requests-Remaining` response header
+
+## Important Notes
+
+- Always use `terminal` tool with `curl` for API calls — do NOT use `web_extract` or `browser`
+- Always check the `errors` array in GraphQL responses — HTTP 200 can still contain errors
+- If `stateId` is omitted when creating issues, Linear defaults to the first backlog state
+- The `description` field supports Markdown
+- Use `python3 -m json.tool` or `jq` to format JSON responses for readability