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The kanban board has had full attachment storage and a dashboard HTTP API (upload/list/download/delete) since #35338, but there was no agent toolset tool and no `hermes kanban` CLI verb for attachments. Agents and scripts that don't go through the dashboard server (or can't touch the DB directly) had no way to create or read real attachments — only links in comments. Close that gap by mirroring the existing comment surface: - `kanban_db.store_attachment_bytes()` — one shared write path (validate name, enforce the 25 MB cap, write the blob under the per-task dir with collision-free naming, insert the metadata row, clean up an orphan blob if the insert fails). `_MAX_ATTACHMENT_BYTES`, `_safe_attachment_name`, and a new `_collision_free_path` move here so the dashboard, the tool, and the CLI all share one implementation and can't drift. - Tools (`tools/kanban_tools.py`): `kanban_attach` (inline base64), `kanban_attach_url` (server-side http/https fetch with the same cap), `kanban_attachments` (list). Write tools respect worker task-ownership; list is read-only. Registered in the `kanban` toolset. - CLI (`hermes_cli/kanban.py`): `attach <id> <path>`, `attachments <id>`, `attach-rm <attachment_id>`. - Dashboard `upload_task_attachment` now imports the shared helpers and uses `_collision_free_path` — behavior identical (still streams to disk with the cap, still 413 on overflow). - Docs (AGENTS.md, kanban-worker skill) and toolset membership updated. Tests: tool round-trip + oversize + bad base64 + ownership; attach_url against a local HTTP fixture incl. oversize-mid-stream and non-http scheme rejection; CLI attach/attachments/attach-rm; shared-helper unit tests; dashboard parity preserved. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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