{"record":{"id":"ce8bd509bdcdd468","repo":"amruthpillai/reactive-resume","slug":"stylesheet-revision-conflict","errorCode":"STYLESHEET_REVISION_CONFLICT","errorMessage":"The resume or stylesheet changed while the candidate was being validated.","messagePattern":"The resume or stylesheet changed while the candidate was being validated\\.","errorType":"error_code","errorClass":"ORPCError","httpStatus":409,"severity":"warning","filePath":"packages/api/src/features/resume/stylesheet-service.ts","lineNumber":339,"sourceCode":"\t\t\t\t\tconst data = parseStoredResumeData({\n\t\t\t\t\t\t...locked.data,\n\t\t\t\t\t\tmetadata: { ...locked.data.metadata, stylesheet: next },\n\t\t\t\t\t});\n\t\t\t\t\treturn transaction.update({ snapshot: locked, data });\n\t\t\t\t});\n\n\t\t\t\tawait dependencies.publish(updated);\n\t\t\t\tobserveActivation(true, updated.stylesheetRevision);\n\n\t\t\t\treturn {\n\t\t\t\t\t...(await stateFromSnapshot(updated, dependencies.convertLegacy)),\n\t\t\t\t\teditGeneration: input.editGeneration,\n\t\t\t\t\tdiagnostics,\n\t\t\t\t};\n\t\t\t} catch (error) {\n\t\t\t\tif (error instanceof StylesheetRevisionConflict) {\n\t\t\t\t\tobserveActivation(false, error.snapshot.stylesheetRevision);\n\t\t\t\t\tthrow new ORPCError(\"STYLESHEET_REVISION_CONFLICT\", {\n\t\t\t\t\t\tstatus: 409,\n\t\t\t\t\t\tmessage: error.message,\n\t\t\t\t\t\tdata: {\n\t\t\t\t\t\t\tstate: await stateFromSnapshot(error.snapshot, dependencies.convertLegacy),\n\t\t\t\t\t\t},\n\t\t\t\t\t});\n\t\t\t\t}\n\n\t\t\t\tobserveActivation(false, snapshot.stylesheetRevision);\n\t\t\t\tthrow error;\n\t\t\t}\n\t\t},\n\t};\n}\n\ntype StylesheetDatabase = Pick<typeof db, \"select\" | \"transaction\">;\n\ntype DatabaseStylesheetServiceOptions = {","sourceCodeStart":321,"sourceCodeEnd":357,"githubUrl":"https://github.com/amruthpillai/reactive-resume/blob/3a5b12e2a40374a9571988701fcb75c5a1831c42/packages/api/src/features/resume/stylesheet-service.ts#L321-L357","documentation":"Optimistic-concurrency guard. The stylesheet service reads a snapshot, does compile/preflight/parity work outside the transaction, then re-locks the row (SELECT ... FOR UPDATE) inside the transaction and compares stylesheetRevision + renderDataVersion to the client's expected values. If either changed, it throws StylesheetRevisionConflict, surfaced as STYLESHEET_REVISION_CONFLICT (HTTP 409) with the fresh state in error.data.state.","triggerScenarios":"Two concurrent activations, or a resume data edit landing between reading the snapshot and the transactional lock, so the client's expectedRevision/expectedRenderDataVersion are stale.","commonSituations":"Two tabs or users editing the same resume, an AI agent and a human editing concurrently, or a client that held stale state for a long time before submitting.","solutions":["Read error.data.state (the fresh snapshot) and re-issue activate with the new expectedRevision/expectedRenderDataVersion.","Serialize stylesheet edits so only one is in flight per resume.","Refresh the stylesheet state in the UI before retrying."],"exampleFix":"// before\nstylesheetService.activate({ id, userId, source, expectedRevision: cached.rev, expectedRenderDataVersion: cached.rdv, ... });\n// after — handle 409 by refreshing\ntry { await activate(...); }\ncatch (e) {\n  if (e.code === 'STYLESHEET_REVISION_CONFLICT') {\n    cached = e.data.state; // fresh rev + rdv\n    await activate({ ..., expectedRevision: cached.stylesheetRevision, expectedRenderDataVersion: cached.renderDataVersion });\n  } else throw e;\n}","handlingStrategy":"retry","validationCode":"function expectedMatches(snapshot, expected) {\n  return snapshot.stylesheetRevision === expected.revision && snapshot.renderDataVersion === expected.renderDataVersion;\n}","typeGuard":null,"tryCatchPattern":"async function activateWithRefresh(input, getState) {\n  for (;;) {\n    try { return await stylesheetService.activate(input); }\n    catch (e) {\n      if (e.code !== 'STYLESHEET_REVISION_CONFLICT') throw e;\n      const fresh = e.data.state;\n      input.expectedRevision = fresh.stylesheetRevision;\n      input.expectedRenderDataVersion = fresh.renderDataVersion;\n    }\n  }\n}","preventionTips":["Always read the fresh state from a STYLESHEET_REVISION_CONFLICT response before retrying.","Serialize concurrent activate/edit operations per resume.","Keep the time between reading state and submitting activate short to shrink the race window."],"tags":["resume","stylesheet","concurrency","conflict","semantic-css"],"backgroundTag":null,"analyzedSha":"3a5b12e2a40374a9571988701fcb75c5a1831c42","analyzedAt":"2026-08-12T22:31:22.666Z","schemaVersion":2},"datasetVersion":"2026-08-12T23:17:12.415Z"}