{"record":{"id":"3482a047892117fc","repo":"gastownhall/beads","slug":"failed-to-update-s-w","errorCode":null,"errorMessage":"failed to update %s: %w","messagePattern":"failed to update (.+?): %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/bd/init_agent.go","lineNumber":99,"sourceCode":"\t\t// Preserve existing full profile when minimal is requested (avoid information loss)\n\t\teffectiveProfile := profile\n\t\texistingMeta := agents.ParseMarker(contentStr[strings.Index(contentStr, \"<!-- BEGIN BEADS INTEGRATION\"):])\n\t\tif existingMeta != nil && existingMeta.Profile == agents.ProfileFull && profile == agents.ProfileMinimal {\n\t\t\teffectiveProfile = agents.ProfileFull\n\t\t\tif verbose {\n\t\t\t\tfmt.Printf(\"  ℹ %s already has full profile; preserving (higher-information) content\\n\", filename)\n\t\t\t}\n\t\t}\n\n\t\t// Update existing section to latest versioned format (upgrades legacy markers)\n\t\tupdated, changed, replaceErr := agents.ReplaceSectionWithOpts(contentStr, effectiveProfile, opts)\n\t\tif replaceErr != nil {\n\t\t\treturn fmt.Errorf(\"failed to update beads section in %s: %w\", filename, replaceErr)\n\t\t}\n\t\tif changed {\n\t\t\t// #nosec G306 - markdown needs to be readable\n\t\t\tif err := os.WriteFile(filename, []byte(updated), 0644); err != nil {\n\t\t\t\treturn fmt.Errorf(\"failed to update %s: %w\", filename, err)\n\t\t\t}\n\t\t\tif verbose {\n\t\t\t\tfmt.Printf(\"  %s Updated beads section in %s to latest format\\n\", ui.RenderPass(\"✓\"), filename)\n\t\t\t}\n\t\t} else if verbose {\n\t\t\tfmt.Printf(\"  %s already has current agent instructions\\n\", filename)\n\t\t}\n\t\treturn nil\n\t}\n\n\t// Append beads section with profile metadata\n\tnewContent := contentStr\n\tif !strings.HasSuffix(newContent, \"\\n\") {\n\t\tnewContent += \"\\n\"\n\t}\n\n\tnewContent += \"\\n\" + agents.RenderSectionWithOpts(profile, opts)\n","sourceCodeStart":81,"sourceCodeEnd":117,"githubUrl":"https://github.com/gastownhall/beads/blob/71377f276968b452ee607177637970a4ff888584/cmd/bd/init_agent.go#L81-L117","documentation":"After ReplaceSectionWithOpts reports changes, updateAgentFile writes the updated file back with os.WriteFile (mode 0644). A write failure is wrapped here, meaning the beads section was computed as changed but the updated markdown could not be persisted to disk.","triggerScenarios":"Updating an existing agent markdown whose beads section changed, but the file/directory is unwritable at write time (permissions changed between read and write, read-only mount, disk full).","commonSituations":"CI workspaces made read-only after checkout; another process holding the file or flipping permissions; disk quota exceeded; immutable bit set on the file.","solutions":["Check and fix write permissions on the file (chmod/chown)","Ensure the working tree is writable before running bd init","Free disk space / raise quota if the disk is full","Check chattr +i or sandbox policies blocking writes and remove the restriction"],"exampleFix":"// before: read-only checkout\n$ bd init\nfailed to update AGENTS.md: read-only file system\n// after\n$ chmod -R u+w . && bd init","handlingStrategy":"validation","validationCode":"[ -w AGENTS.md ] || { echo \"AGENTS.md not writable\" >&2; exit 1; }","typeGuard":null,"tryCatchPattern":"if err := addAgentsInstructions(...); err != nil && strings.Contains(err.Error(), \"failed to update \") { log.Fatalf(\"cannot persist updated agent file: %v\", err) }","preventionTips":["Confirm file write access before init when agent files exist","Avoid read-only mounts for active workspaces","Check for immutable attributes (chattr +i) on managed files","Monitor disk quota on the workspace volume"],"tags":["filesystem","permissions","agents","init"],"backgroundTag":"file-write-permission-denied","analyzedSha":"71377f276968b452ee607177637970a4ff888584","analyzedAt":"2026-08-30T18:55:39.744Z","schemaVersion":2},"datasetVersion":"2026-08-30T23:17:21.991Z"}