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docs(pilot): dashboard README

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k8s/pragent-dashboard.yaml
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# pragent pilot — central dashboard service.
#
# Read-only overview + per-repo / per-PR drilldown over the same SQLite
# feedback DB the webhook writes. Also mutates `.pr-review.json` on covered
# repos via the Gitea contents API (Tasks C+D in pilot/dashboard.py). Same
# image as the webhook (`pragent-webhook:optin`) — all pilot modules are
# baked in at /app/pilot/.
#
# Routes: GET / (overview), GET /r/<o>/<n> (repo), GET /r/<o>/<n>/<i> (PR),
# GET /r/<o>/<n>/<i>/raw (PR markdown raw), GET /login, GET /static/style.css,
# POST /login, POST /r/<o>/<n>/edit.
#
# Auth: PRAGENT_DASHBOARD_TOKEN in the pragent-webhook Secret, cookie
# `pragent_dash=<token>`, single-user. Empty / unset = no auth (tailnet-only).
#
# NodePort 30082 — only reachable on the Tailscale / LAN side of kubernets
# (100.74.17.70 / 192.168.1.80) until/unconfigured. Mirrors pragent-webhook.yaml
# in every other respect (uid 10001, nodeSelector, /data PVC).
apiVersion: apps/v1
kind: Deployment
metadata:
name: pragent-dashboard
namespace: pragent
labels:
app: pragent-dashboard
spec:
replicas: 1
selector:
matchLabels:
app: pragent-dashboard
template:
metadata:
labels:
app: pragent-dashboard
spec:
# Same node as the webhook — holds the headroom proxy + the /data PVC.
nodeSelector:
kubernetes.io/hostname: kubernets
# Dashboard is read-only over /data and only mutates Gitea (not local
# files), so unprivileged is fine. fsGroup matches the image's USER
# directive (10001) so the RO mount is readable.
securityContext:
runAsNonRoot: true
runAsUser: 10001
runAsGroup: 10001
fsGroup: 10001
containers:
- name: dashboard
image: pragent-webhook:optin
imagePullPolicy: Never
workingDir: /app
command: ["python3", "-m", "pilot.dashboard"]
ports:
- name: http
containerPort: 8081
env:
- name: PRAGENT_FEEDBACK_DB
value: /data/feedback.db
- name: PRAGENT_GITEA_API
value: http://gitea-http.gitea.svc.cluster.local:3000
# Dashboard reads DASHBOARD_PORT (not PORT) — verified in
# pilot/dashboard.py:51. Default 8081 if unset.
- name: DASHBOARD_PORT
value: "8081"
# Used by /r/<o>/<n>/edit to PUT updated JSON to the repo's
# contents API. Reuses the same bot token the webhook uses.
- name: PRAGENT_BOT_TOKEN
valueFrom:
secretKeyRef:
name: pragent-webhook
key: PRAGENT_BOT_TOKEN
# Auth cookie value. Add to the pragent-webhook Secret with:
# kubectl patch secret pragent-webhook -n pragent --type=json \
# -p='[{"op":"add","path":"/data/PRAGENT_DASHBOARD_TOKEN","value":"<base64>"}]'
- name: PRAGENT_DASHBOARD_TOKEN
valueFrom:
secretKeyRef:
name: pragent-webhook
key: PRAGENT_DASHBOARD_TOKEN
# /data is read-only — the dashboard doesn't write the SQLite file;
# .pr-review.json mutations go through the Gitea contents API, not
# local fs. RO avoids any chance of two pods racing the same RWO PVC.
volumeMounts:
- name: feedback-data
mountPath: /data
readOnly: true
# No /health route in dashboard.py (returns 404 on unknown paths).
# Probes omitted intentionally — see pilot/dashboard.py:687-721.
# Resources: dashboard is read-heavy + tiny writes. /data RO + no
# subprocess fan-out (no opencode) keeps footprint small.
resources:
requests:
cpu: 100m
memory: 256Mi
limits:
cpu: 500m
memory: 512Mi
volumes:
- name: feedback-data
persistentVolumeClaim:
claimName: pragent-feedback-data
---
apiVersion: v1
kind: Service
metadata:
name: pragent-dashboard
namespace: pragent
spec:
selector:
app: pragent-dashboard
ports:
- name: http
port: 80
targetPort: http
type: NodePort
# 30082 — between pages-proxy (30081) and browserless (30100), outside the
# 30096..30969 media range. Tailscale / LAN only until a Caddy route is set.
pilot/README-dashboard.md
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# pragent pilot — central dashboard service
A read-only overview + per-repo / per-PR drilldown over the same SQLite
feedback DB the webhook writes, plus a small form to mutate `.pr-review.json`
on a covered repo via the Gitea contents API. Companion to the
[webhook service](README-webhook.md); reuses the webhook image
(`pragent-webhook:optin`) — the pilot modules are baked into `/app/pilot/`,
and the dashboard is just `python3 -m pilot.dashboard`.
## Architecture
```
Browser (tailnet)
│
▼
NodePort :30082 on 100.74.17.70 (kubernets)
│
▼
Service pragent-dashboard.pragent.svc.cluster.local (NodePort, ns pragent)
│
▼
pragent-dashboard pod (uid 10001, /data RO, no subprocess fan-out)
│
├── read /data/feedback.db (PVC pragent-feedback-data, RO)
├── GET .../repos/{o}/{r}/... (Gitea contents API, bot token)
└── PUT .../repos/{o}/{r}/contents/.pr-review.json
(edit form submit; Gitea commits a new sha)
```
Fail-soft. Nothing is ever written to local disk by the dashboard — the
SQLite file is read-only and `.pr-review.json` mutations go through Gitea's
contents API so the commit history records who changed what.
## What it does
- **Overview** (`GET /`): summary stats across all onboarded repos — total
reviews, distinct PRs, finding counts by severity, false-positive /
accepted-pattern scores (see "Feedback loop" in README-webhook.md), and a
sparkline of review activity.
- **Repo drilldown** (`GET /r/<owner>/<name>`): per-repo PRs with their
last-review status, finding counts, and links to PR-level drilldowns.
- **PR drilldown** (`GET /r/<owner>/<name>/<index>`): the bot's review(s)
on that PR, inline findings, and reaction / resolved status harvested
by `feedback_harvest.py`.
- **Raw review** (`GET /r/<owner>/<name>/<index>/raw`): the markdown body
of the most recent review, for copy-paste / diff-with-prose workflows.
- **Edit form** (`POST /r/<owner>/<name>/edit`): a small HTML page that
loads the current `.pr-review.json` from the repo's default branch and
lets the operator edit the JSON (validated, then PUT to Gitea contents
API). This is how repo-local `focus` / `instructions` /
`reviewers` / `severity_threshold` get tuned per-repo after seeing
the feedback roll-up.
- **Auth** (`GET /login`, `POST /login`): single-user cookie
`pragent_dash=<token>` when `PRAGENT_DASHBOARD_TOKEN` is set in the
Secret. Unset = no auth (tailnet-only mode; logged on startup).
All routes return HTML (or plain text for `/raw`) with the same stylesheet
(`/static/style.css`).
## Routes
| method | path | auth | description |
|--------|-----------------------------------|------|----------------------------------------------|
| GET | `/` | yes | Overview |
| GET | `/login` | no | Login form |
| POST | `/login` | no | Sets the `pragent_dash` cookie |
| GET | `/static/style.css` | no | Stylesheet |
| GET | `/r/<owner>/<name>` | yes | Repo drilldown |
| GET | `/r/<owner>/<name>/<index>` | yes | PR drilldown |
| GET | `/r/<owner>/<name>/<index>/raw` | yes | Most recent review body as markdown |
| POST | `/r/<owner>/<name>/edit` | yes | Edit `.pr-review.json` on the default branch |
There is no `/health` route — don't add one to the k8s probes without
updating `pilot/dashboard.py` (the handler returns 404 on unknown paths,
so a probe would loop forever).
## Mutations flow through Gitea, not local fs
The edit endpoint reads the current `.pr-review.json` from
`GET /repos/{o}/{r}/contents/.pr-review.json?ref=<default-branch>`, lets
the operator edit it in a form (validated as JSON, length-capped per
field, no schema migration), and PUTs the new content back via the
contents API with a commit message like
`pragent dashboard: update .pr-review.json`. Every edit is a real Gitea
commit on the default branch, attributable to `pragent-bot`, and the
next webhook fire picks up the new config — no Pod restart, no image
rebuild, no pod-level state.
The `/data` mount is **read-only** (see the `readOnly: true` on the
volumeMount in `~/k8s/pragent-dashboard.yaml`): the dashboard never
writes the SQLite file, only the webhook + the daily cronjob do, and
keeping it RO means a buggy deploy can't corrupt the harvested feedback.
## Auth (single-user cookie)
`PRAGENT_DASHBOARD_TOKEN` in the `pragent-webhook` Secret is the value
the dashboard expects on the `pragent_dash` cookie. The login form
accepts it on POST / login and sets the cookie. Empty / unset env var
disables auth (logged on startup: `auth OFF (tailnet-only mode)`).
Generate a token once:
```bash
openssl rand -hex 16
```
Add to the Secret (the dashboard reads it as `PRAGENT_DASHBOARD_TOKEN`):
```bash
# base64 the token first
printf '<token>' | base64
# then JSON-patch the Secret
microk8s kubectl patch secret pragent-webhook -n pragent --type=json \
-p='[{"op":"add","path":"/data/PRAGENT_DASHBOARD_TOKEN","value":"<b64>"}]'
```
The token also lives in `~/.config/pragent/dashboard-token` (mode 600) so
you can paste it into the login form without re-reading the Secret.
## Deploy
The dashboard shares the webhook image, so there's nothing to rebuild.
After editing `pilot/dashboard.py` or `pilot/dashboard_data.py`, redo the
webhook image rebuild + containerd import (see `README-webhook.md` § "K8s
deployment") and roll both deployments.
```bash
K="microk8s kubectl"
# 1. (one-time) generate + persist the auth token
TOKEN=$(openssl rand -hex 16)
printf "%s" "$TOKEN" > ~/.config/pragent/dashboard-token
chmod 600 ~/.config/pragent/dashboard-token
printf "%s" "$TOKEN" | base64 \
| xargs -I{} $K -n pragent patch secret pragent-webhook --type=json \
-p='[{"op":"add","path":"/data/PRAGENT_DASHBOARD_TOKEN","value":"{}"}]'
# 2. apply the manifest
$K apply -f ~/k8s/pragent-dashboard.yaml
# 3. roll on image / code changes
$K -n pragent rollout restart deploy/pragent-dashboard
$K -n pragent rollout status deploy/pragent-dashboard --timeout=120s
$K -n pragent logs -f deploy/pragent-dashboard
```
K8s manifest at `~/k8s/pragent-dashboard.yaml`. Key fields:
- `image: pragent-webhook:optin` + `imagePullPolicy: Never` — local
containerd only, same image as the webhook.
- `nodeSelector: kubernetes.io/hostname: kubernets` — pinned to the node
holding the `/data` PVC.
- `securityContext: runAsNonRoot: true, runAsUser: 10001, runAsGroup:
10001, fsGroup: 10001` — matches the image's USER directive; fsGroup
makes the RO hostpath volume readable.
- `volumeMounts.feedback-data.readOnly: true` — dashboard is read-only
over `/data`; mutations go through Gitea, not local fs.
- No `readinessProbe` / `livenessProbe` — the dashboard has no `/health`
route. If you add one to `pilot/dashboard.py`, add a probe here too.
- `resources.requests: {cpu: 100m, memory: 256Mi}` /
`limits: {cpu: 500m, memory: 512Mi}` — read-heavy + tiny writes, no
opencode subprocess fan-out, much smaller than the webhook.
- `Service.type: NodePort`, `nodePort: 30082` — between pages-proxy
(30081) and browserless (30100), outside the 30096..30969 media range.
## Smoke test
```bash
# 1. port-forward (in-cluster)
microk8s kubectl port-forward -n pragent svc/pragent-dashboard 8181:80 &
sleep 2
curl -s -o /tmp/dash-overview.html -w "HTTP %{http_code}\n" \
http://localhost:8181/
grep -o "<title>[^<]*</title>" /tmp/dash-overview.html
head -50 /tmp/dash-overview.html
kill %1
# 2. NodePort (host-side, Tailscale IP — only reachable on 100.74.17.70
# or 192.168.1.80; no public DNS yet)
curl -s -o /tmp/dash-nodeport.html -w "HTTP %{http_code}\n" \
http://100.74.17.70:30082/
grep -o "<title>[^<]*</title>" /tmp/dash-nodeport.html
# 3. auth: POST the login cookie value, capture into a jar
curl -sS -c /tmp/dash.jar -X POST \
-d "token=$(cat ~/.config/pragent/dashboard-token)" \
http://100.74.17.70:30082/login
# 4. authenticated overview
curl -sS -b /tmp/dash.jar -o /tmp/dash-auth.html -w "HTTP %{http_code}\n" \
http://100.74.17.70:30082/
grep -o "<title>[^<]*</title>" /tmp/dash-auth.html
# 5. pod logs
microk8s kubectl logs -n pragent -l app=pragent-dashboard --tail=50
```
The HTML should contain a `<title>` (whatever the dashboard renders) and
**never** `Traceback` or any Python exception output. A 401 / redirect
to `/login` on the unauthenticated GETs is expected when
`PRAGENT_DASHBOARD_TOKEN` is set.
## Threat model / security notes
- **Tailnet-only by default.** NodePort 30082 is exposed on the
Tailscale / LAN interfaces of kubernets (100.74.17.70, 192.168.1.80).
No public DNS, no Caddy route yet — keep it that way until the auth
story is solid. When you do add a public route, terminate TLS at
Caddy (wildcard cert via Cloudflare DNS-01) and rely on the cookie
auth + Logto SSO gating pattern from the
[code-server / minecraft-sso / livecodes setups](../).
- **`PRAGENT_BOT_TOKEN` is Gitea Write scoped** to onboarded repos, so a
successful auth bypass on the dashboard is Gitea repo write access,
not just read. The cookie is the only auth factor — there is no CSRF
token in the current implementation (single-operator trust model). If
the dashboard goes public, add a CSRF token to the edit form
(hidden input + double-submit cookie) before opening it up.
- **Read-only `/data` mount.** The dashboard can't corrupt the
harvested SQLite file even if it's compromised. The webhook and the
daily cronjob are the only writers.
- **`uid 10001` + `runAsNonRoot: true`.** No host-level escalation if
the dashboard is popped — it has no caps, no `/proc` mounts, no
NetworkPolicy exemption (cluster default deny applies until you
grant egress to `gitea-http.gitea.svc.cluster.local:3000` and
`100.74.17.70:8787` if you ever need the headroom proxy — currently
the dashboard doesn't).
- **No author-controlled input is `eval`-ed.** The edit form parses the
JSON, validates types / lengths, and re-serialises before the Gitea
PUT. The review-side hostile-input concerns from `README-webhook.md`
§ "Threat model" do **not** apply to the dashboard — the dashboard
is a read-mostly viewer over already-harvested, already-posted data.
## Known limitations (pilot)
- Single-user cookie auth (no per-user sessions, no Logto SSO yet).
- No CSRF protection on the edit form (intentional — single-operator
trust model; add before going public).
- Read-only `/data` means the dashboard can't backfill the DB if the
cronjob is paused; if you turn off feedback harvesting
(`PRAGENT_FEEDBACK_DB=` empty in the webhook), the overview is empty.
- No `/health` route — if the dashboard process wedges on a Gitea hang,
k8s won't restart it. Add a `/health` route to `pilot/dashboard.py`
+ a probe here before relying on this in production.
- The overview is a single-process render over a SQLite file that the
daily cronjob also writes. A long Gitea hang during a page render can
stall the dashboard until the client request times out (30 s). The
underlying SQLite reader is read-only and concurrent-safe, so no
data corruption — just a slow page.