nexus/.planning/phases/25-file-system/25-07-SUMMARY.md

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
25-file-system	07	api	placeholder agent-generated manifest markdown chat-files	phase provides 25-01 chatFileService with create/getById/createReference methods phase provides 25-06 git-file-service with storageDir pattern (on separate worktree; storageDir import added here)	placeholderService with addEntry/replaceEntry/listEntries managing PLACEHOLDERS.md chatFileService.markAsPlaceholder method POST /files/:fileId/replace endpoint for placeholder replacement Agent-generated file tracking in PLACEHOLDERS.md manifest	25-06 future-agent-file-generation	added patterns placeholderService reads/writes PLACEHOLDERS.md markdown tables fire-and-forget phSvc.addEntry() on upload (non-blocking) replace endpoint updates manifest + creates reference chain atomically	created modified server/src/services/placeholder-service.ts server/src/services/chat-files.ts server/src/routes/chat-files.ts packages/shared/src/types/chat.ts packages/shared/src/index.ts .planning/REQUIREMENTS.md	placeholderService reads/writes PLACEHOLDERS.md using regex row parser to avoid markdown deps addEntry is fire-and-forget (.catch(() => {})) — response not blocked by file I/O replaceEntry is awaited in /replace endpoint — manifest must be consistent before response resolveDefaultStorageDir() used for projectDir path — consistent with git-file-service pattern	Placeholder manifest: Active Placeholders and Replaced markdown tables in PLACEHOLDERS.md per project dir Replace endpoint: phSvc.replaceEntry + fileSvc.createReference for atomically updating both manifest and DB	FILE-08 FILE-11	10min	2026-04-02

Phase 25 Plan 07: Agent-Generated File Support and Placeholder Tracking Summary

PLACEHOLDERS.md manifest service with addEntry/replaceEntry and POST /files/:fileId/replace endpoint wiring agent-generated uploads to per-project markdown manifests

Performance

• Duration: ~10 min
• Started: 2026-04-02T00:09:00Z
• Completed: 2026-04-02T00:12:49Z
• Tasks: 2
• Files modified: 5

Accomplishments

• Created placeholder-service.ts with full PLACEHOLDERS.md markdown table management (addEntry, replaceEntry, listEntries)
• Added markAsPlaceholder method to chatFileService for DB-level placeholder categorization
• Wired agent_generated + project-scoped uploads to automatically update PLACEHOLDERS.md
• Added POST /files/:fileId/replace endpoint that updates manifest and creates DB reference chain
• Marked FILE-08 and FILE-11 Complete in REQUIREMENTS.md

Task Commits

Each task was committed atomically:

1. Task 1: Create placeholderService and add markAsPlaceholder method - 0a80659c (feat)
2. Task 2: Add placeholder and agent-generated file routes - 2a4037ca (feat)

Files Created/Modified

• server/src/services/placeholder-service.ts - PLACEHOLDERS.md manifest management service (161 lines)
• server/src/services/chat-files.ts - Added markAsPlaceholder method
• server/src/routes/chat-files.ts - Added phSvc import, agent_generated tracking, /replace endpoint
• packages/shared/src/types/chat.ts - Added ChatPlaceholderEntry interface
• packages/shared/src/index.ts - Exported ChatPlaceholderEntry
• .planning/REQUIREMENTS.md - Marked FILE-08 and FILE-11 Complete

Decisions Made

• Used regex row parser (/^\|\s*(.+?)\s*\|\s*(.+?)\s*\|\s*(.+?)\s*\|$/) to parse markdown tables — no external markdown deps needed
• addEntry is fire-and-forget (non-blocking) to avoid blocking upload response
• replaceEntry is awaited in the replace endpoint for manifest consistency before response
• Used resolveDefaultStorageDir() for project dir base path, consistent with 25-06 storageDir pattern
• git-file-service.ts not present on this branch (in 25-06 worktree); storageDir import added here for placeholder path only

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

• git-file-service.ts not present on current branch (it's in the 25-06 worktree). Per the important_context note, proceeded with placeholder-service implementation and imported resolveDefaultStorageDir directly for the project path computation. No blocking impact.

Next Phase Readiness

• PLACEHOLDERS.md manifest management complete; any agent that uploads with source=agent_generated and projectId will auto-track
• Replace endpoint ready for agent workflows that upgrade placeholder assets to final outputs
• FILE-08 and FILE-11 marked complete

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Phase: 25-file-system Completed: 2026-04-02