feat(api): add Linear tRPC discovery endpoints

[aaight]

Summary

• Adds 5 Linear tRPC discovery endpoints to integrationsDiscoveryRouter following the established Trello/JIRA pattern
• Implements verifyLinear, linearTeams, linearTeamsByProject, linearTeamDetails, and linearTeamDetailsByProject
• Adds withLinearCreds helper function consistent with the existing withTrelloCreds / withJiraCreds pattern
• All endpoints protected, error-handled via wrapIntegrationCall, and covered by unit tests

Trello card: https://trello.com/c/69deb08491c7cec4bca301fe

Endpoints Added

Endpoint	Input	Description
verifyLinear	{ apiKey }	Calls linearClient.getMe(), returns { id, name, displayName }
linearTeams	{ apiKey }	Calls linearClient.getTeams(), returns team array
linearTeamsByProject	{ projectId }	Resolves API key from stored credentials, returns teams
linearTeamDetails	{ apiKey, teamId }	Calls getTeamWorkflowStates + getTeamLabels, returns { states, labels }
linearTeamDetailsByProject	{ projectId, teamId }	Resolves stored API key, returns { states, labels }

Test plan

• verifyLinear — success path returns id/name/displayName, API failure → BAD_REQUEST, empty apiKey → validation error, unauthenticated → UNAUTHORIZED
• linearTeams — success path returns team array, API failure → BAD_REQUEST, unauthenticated → UNAUTHORIZED
• linearTeamsByProject — success with stored creds, missing credential → NOT_FOUND, org access denied → FORBIDDEN, API failure → BAD_REQUEST, unauthenticated → UNAUTHORIZED
• linearTeamDetails — success returns { states, labels }, API failure → BAD_REQUEST, empty teamId → validation error, unauthenticated → UNAUTHORIZED
• linearTeamDetailsByProject — success with stored creds, missing credential → NOT_FOUND, org access denied → FORBIDDEN, empty teamId → validation error, API failure → BAD_REQUEST, unauthenticated → UNAUTHORIZED
• All 7472 unit tests passing
• Lint and type checks passing

🤖 Generated with Claude Code

🕵️ claude-code · claude-sonnet-4-6 · run details

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[nhopeatall]

LGTM — Clean addition of 5 Linear discovery endpoints that faithfully follow the established Trello/JIRA pattern in this router.

What I verified:

• All 5 endpoints use protectedProcedure (auth), wrapIntegrationCall (error handling), and withLinearCredentials (credential scoping) — consistent with the Trello and JIRA counterparts.
• linearCredsInput validates apiKey with z.string().min(1), matching the LinearCredentials type ({ apiKey: string }) in src/linear/types.ts.
• The withLinearCreds helper follows the same shape as withTrelloCreds and withJiraCreds.
• ByProject variants correctly call verifyProjectOrgAccess before credential resolution, throw NOT_FOUND on missing credentials, and wrap the Linear API call in wrapIntegrationCall.
• linearTeamDetails and linearTeamDetailsByProject correctly use Promise.all for parallel fetching of states and labels (same pattern as trelloBoardDetails fetching lists/labels/customFields).
• verifyLinear correctly projects only { id, name, displayName } from the getMe() response, matching the LinearUser interface.
• Test coverage is comprehensive: auth (UNAUTHORIZED), success paths, error wrapping (BAD_REQUEST), input validation (empty strings), org access denial (FORBIDDEN), and missing credentials (NOT_FOUND).
• All CI checks pass.

🕵️ claude-code · claude-opus-4-6 · run details