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fn_registry/dev/issues/0130b-kanban-cpp-v2-backend.md
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egutierrez a3f75d61ec chore: avance acumulado de sesiones previas (reorg dev/issues + ajustes)
Reorganizacion de dev/issues en subcarpetas (completed/, cpp/, gamedev/,
kanban/, trading/, imagegen/, matrix/) y cambios acumulados en cmd/fn/pyrunner,
.claude/commands y settings. Trabajo de otro LLM/sesion, commiteado a peticion
del usuario para desbloquear el working tree. Excluido logs/ardour_mcp_server.log (ruido).
2026-06-30 14:43:51 +02:00

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---
id: "0130b"
title: "Backend Go kanban_cpp v2: schema + handlers + watcher + SSE"
status: pendiente
type: app
domain:
- apps-infra
- dev-ux
scope: app-scoped
priority: alta
depends: ["0130a"]
blocks:
- "0130c"
related:
- "0130"
created: 2026-05-22
updated: 2026-05-22
tags: [service, kanban, go, sqlite, sse]
flow: "0130"
---
# 0130b — Backend Go kanban_cpp v2
**Status:** pendiente
## Por que
Servicio HTTP local que sirve los issues + flows del proyecto al frontend C++. Es un wrapper fino sobre las funciones del registry de 0130a + SQLite cache + watcher.
## Estructura
```
apps/kanban_cpp/backend/
app.md # tag service
go.mod
main.go # entry: flags + run
db.go # open + apply migrations + upsert helpers
handlers.go # endpoints REST
sse_hub.go # broadcaster
watcher.go # bind a watch_dir_fsnotify + re-ingesta + emit SSE
ingest.go # scan → upsert; usa 0130a
migrations/
001_init.sql
operations.db # creada en runtime
```
## Endpoints
| Verbo | Path | Notas |
|---|---|---|
| GET | `/api/health` | `{ok:true, version, count_issues, count_flows}` |
| GET | `/api/issues` | filtros: `status`, `domain`, `priority`, `tag`, `scope` |
| GET | `/api/issues/{id}` | issue + body |
| PATCH | `/api/issues/{id}` | partial update frontmatter → `write_issue_md` + re-ingesta + SSE |
| GET | `/api/flows` | filtros: `status`, `kind` |
| GET | `/api/flows/{id}` | flow + body |
| GET | `/api/meta` | enums leidos de `dev/TAXONOMY.md` |
| GET | `/api/sse` | stream `{type, id, path}` |
CORS abierto local (`*`). Logger middleware.
## Schema (migrations/001_init.sql)
```sql
CREATE TABLE IF NOT EXISTS issues (
id TEXT PRIMARY KEY,
title TEXT NOT NULL,
status TEXT NOT NULL,
type TEXT,
scope TEXT,
priority TEXT,
domain_json TEXT NOT NULL DEFAULT '[]',
tags_json TEXT NOT NULL DEFAULT '[]',
depends_json TEXT NOT NULL DEFAULT '[]',
blocks_json TEXT NOT NULL DEFAULT '[]',
related_json TEXT NOT NULL DEFAULT '[]',
flow_id TEXT,
body TEXT NOT NULL DEFAULT '',
file_path TEXT NOT NULL,
mtime_ns INTEGER NOT NULL,
created_at TEXT,
updated_at TEXT,
completed INTEGER NOT NULL DEFAULT 0 -- 1 si vive en completed/
);
CREATE INDEX IF NOT EXISTS idx_issues_status ON issues(status);
CREATE INDEX IF NOT EXISTS idx_issues_priority ON issues(priority);
CREATE TABLE IF NOT EXISTS flows (
id TEXT PRIMARY KEY,
title TEXT NOT NULL,
status TEXT,
kind TEXT,
tags_json TEXT NOT NULL DEFAULT '[]',
body TEXT NOT NULL DEFAULT '',
file_path TEXT NOT NULL,
mtime_ns INTEGER NOT NULL
);
```
## DoD
- `curl http://localhost:8487/api/health` devuelve 200 + counts.
- `curl http://localhost:8487/api/issues | jq 'length' >= 90`.
- `curl -X PATCH /api/issues/0130 -d '{"status":"in-progress"}'` reescribe `dev/issues/0130-*.md` (status updated, body intacto).
- Despues del PATCH, suscriptor SSE recibe evento `{type:"updated", id:"0130"}`.
- Tras `mv dev/issues/0130-*.md dev/issues/completed/`, watcher actualiza fila (`completed=1`).
- `go test ./...` verde.
## Anti-scope
- No expone proposals ni capabilities (eso es MCP registry).
- No autentica (local-only por ahora).
- No persiste estado UI (eso lo hace el frontend).