feat(security): trusted-services surface + auth mgmt client (M2 §3)

Maestro is the UI/CA, not the enforcement: the auth service owns its
authorized-keys trust store. This is Maestro's side of the flow.

- lib/authmgmt: mTLS management client (Maestro's own identity cert from
  the instance CA) for /internal/{attestation,authorizations,revoke,
  pending}; RevokeServiceBestEffort for uninstall.
- handlers/peers: GET /api/peers, /api/peers/attestation, POST
  approve/revoke.
- uninstall: revoke the service's authorization in the auth trust store
  alongside the CRL identity revocation.
- frontend: TrustedServices panel (pending first-contact authorizations +
  approved keys with authorize/ignore/revoke actions).
- spec.yaml: document the new endpoints and schemas.
- housekeeping: untrack pki test log artifacts, gofmt fixes in pki.

.gitignore

@@ -1 +1,2 @@
 .env
+logs/

spec.yaml

@@ -29,6 +29,62 @@ components:
         message:
           type: string
 
+    PendingAuthorization:
+      type: object
+      description: A first-contact authorization request awaiting the instance owner (M2 §3).
+      properties:
+        service:
+          type: string
+          example: "keepnote"
+        fingerprint:
+          type: string
+          example: "sha256:aa:bb:cc:dd"
+        first_seen:
+          type: string
+        last_seen:
+          type: string
+
+    AuthorizedKey:
+      type: object
+      description: An approved peer row of the auth service's trust store.
+      properties:
+        service:
+          type: string
+        fingerprint:
+          type: string
+        approved_by:
+          type: string
+        approved_at:
+          type: string
+        revoked_at:
+          type: string
+          nullable: true
+
+    PeerAction:
+      type: object
+      required: [service, fingerprint]
+      properties:
+        service:
+          type: string
+          description: The service name (cert CN / org.dcntrlized.service).
+        fingerprint:
+          type: string
+          description: The SHA256 public-key fingerprint (sha256:…) shown to the owner.
+
+    Attestation:
+      type: object
+      description: The auth service's public signing key statement (D3).
+      properties:
+        public_key:
+          type: string
+        fingerprint:
+          type: string
+          example: "sha256:…"
+        kid:
+          type: string
+        issued_at:
+          type: string
+
     RegistryContainer:
       type: object
       required: [name, image]
@@ -399,3 +455,94 @@ paths:
       responses:
         '101':
           description: Switching Protocols - WebSocket upgrade
+
+  /api/peers:
+    get:
+      summary: List pending authorizations and the approved peer trust store
+      tags: ["security"]
+      description: >
+        Security theme M2 §3. Returns the shared auth service's first-contact
+        authorization requests (services whose certificate is valid but has
+        not been approved by the instance owner yet) and the approved keys.
+        Maestro is only the UI; the auth service owns the enforcement.
+      responses:
+        '200':
+          description: Combined pending + approved trust state
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  pending:
+                    type: array
+                    items:
+                      $ref: '#/components/schemas/PendingAuthorization'
+                  authorized:
+                    type: array
+                    items:
+                      $ref: '#/components/schemas/AuthorizedKey'
+        '500':
+          description: Internal server error (auth management client unavailable)
+        '502':
+          description: Failed to reach the shared auth service
+
+  /api/peers/attestation:
+    get:
+      summary: Read the auth service's public signing key statement
+      tags: ["security"]
+      description: >
+        The auth service's RSA public key, its kid, and the sha256 fingerprint
+        peers should pin after first contact (TOFU, D3).
+      responses:
+        '200':
+          description: Auth public key attestation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Attestation'
+        '502':
+          description: Failed to reach the shared auth service
+
+  /api/peers/approve:
+    post:
+      summary: Approve a peer's fingerprint in the auth service trust store
+      tags: ["security"]
+      description: >
+        Forwards the instance owner's approval for a service's identity
+        fingerprint. After this call the service's requests to /auth/* proceed
+        normally (enforced by the auth service itself).
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/PeerAction'
+      responses:
+        '200':
+          description: Peer approved
+        '400':
+          description: Missing service or fingerprint
+        '502':
+          description: Failed to reach the shared auth service
+
+  /api/peers/revoke:
+    post:
+      summary: Revoke a peer's fingerprint (returns it to the no-op path)
+      tags: ["security"]
+      description: >
+        Forwards the instance owner's revocation. Calls from that fingerprint
+        become uniform 403 no-ops again immediately (the SSH authorized_keys
+        "delete the line" action).
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/PeerAction'
+      responses:
+        '200':
+          description: Peer revoked
+        '400':
+          description: Missing service or fingerprint
+        '502':
+          description: Failed to reach the shared auth service

src/frontend/src/app.tsx

@@ -24,6 +24,7 @@ import type { DatabaseStatus, ServiceFilter } from '@lib/types'
 import { Header } from '@components/layout/header'
 import { Toolbar } from '@components/layout/toolbar'
 import { ServiceGrid } from '@components/service/service-grid'
+import { TrustedServices } from '@components/service/trusted-services'
 import { Toaster } from '@components/ui/sonner'
 import { EmptyState, LoadingState, RegistryErrorState } from '@components/layout/status-states'
 
@@ -106,6 +107,8 @@ export function App() {
               }}
             />
 
+            <TrustedServices />
+
             <p className="text-xs text-muted-foreground" role="status">
               Showing {visible.length} of {counts.total} services
             </p>

src/frontend/src/components/service/trusted-services.tsx

@@ -0,0 +1,181 @@
+/**
+ * Copyright (C) 2026 Dcntrlized
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { useEffect, useState } from 'preact/hooks'
+import { BadgeCheck, Check, LoaderCircle, ShieldCheck, X } from 'lucide-react'
+import { Button } from '@components/ui/button'
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@components/ui/card'
+import { toast } from 'sonner'
+import { approvePeer, fetchTrustState, revokePeer } from '@lib/api/peers'
+import { useAsyncAction } from '@lib/hooks/useAsyncAction'
+import { cn } from '@lib/utils'
+import type { PeerAuthorized, PeerPending, PeerTrustState } from '@lib/types'
+
+type LoadState =
+  | { kind: 'loading' }
+  | { kind: 'ok'; state: PeerTrustState }
+  | { kind: 'error'; message: string }
+
+function errorMessage(error: unknown): string {
+  return error instanceof Error ? error.message : 'Unknown error'
+}
+
+function shortFingerprint(fp: string): string {
+  if (fp.length <= 16) return fp
+  return `${fp.slice(0, 16)}…`
+}
+
+/**
+ * The trusted-services surface (security theme M2 §3): pending first-contact
+ * authorizations and the approved trust store. Maestro is only the UI — the
+ * auth service owns the enforcement, so this panel is a convenience, not a
+ * security boundary. Hidden entirely when the management API is unreachable.
+ */
+export function TrustedServices() {
+  const [state, setState] = useState<LoadState>({ kind: 'loading' })
+
+  const load = async () => {
+    try {
+      const trust = await fetchTrustState()
+      setState({ kind: 'ok', state: trust })
+    } catch (error) {
+      setState({ kind: 'error', message: errorMessage(error) })
+    }
+  }
+
+  useEffect(() => {
+    void load()
+  }, [])
+
+  if (state.kind === 'loading') return null
+  if (state.kind === 'error') return null
+  if (state.state.pending.length === 0 && state.state.authorized.length === 0) return null
+
+  const pending = state.state.pending
+  const authorized = state.state.authorized.filter((k) => !k.revoked_at)
+
+  return (
+    <Card data-slot="trusted-services">
+      <CardHeader>
+        <CardTitle className="flex items-center gap-2">
+          <ShieldCheck className="size-4 text-muted-foreground" />
+          Trusted services
+        </CardTitle>
+        <CardDescription>
+          Services asking to talk to the auth service. Approve a fingerprint to authorize it (SSH
+          authorized_keys, applied to the service fleet); revoke cuts it off immediately.
+        </CardDescription>
+      </CardHeader>
+
+      {pending.length > 0 && (
+        <CardContent data-slot="trusted-pending" className="grid gap-2">
+          {pending.map((p) => (
+            <PendingRow key={`${p.service}:${p.fingerprint}`} entry={p} onDone={load} />
+          ))}
+        </CardContent>
+      )}
+
+      {authorized.length > 0 && (
+        <CardContent data-slot="trusted-approved" className="grid gap-2">
+          {authorized.map((k) => (
+            <AuthorizedRow key={`${k.service}:${k.fingerprint}`} entry={k} onDone={load} />
+          ))}
+        </CardContent>
+      )}
+    </Card>
+  )
+}
+
+function PendingRow({ entry, onDone }: { entry: PeerPending; onDone: () => void }) {
+  const approve = useAsyncAction(async () => {
+    try {
+      await approvePeer(entry.service, entry.fingerprint)
+      toast.success(`Authorized ${entry.service}`, { description: shortFingerprint(entry.fingerprint) })
+      onDone()
+    } catch (error) {
+      toast.error(`Failed to authorize ${entry.service}`, { description: errorMessage(error) })
+    }
+  })
+
+  const deny = useAsyncAction(async () => {
+    try {
+      await revokePeer(entry.service, entry.fingerprint)
+      toast.success(`Ignored ${entry.service}`, { description: shortFingerprint(entry.fingerprint) })
+      onDone()
+    } catch (error) {
+      toast.error(`Failed to ignore ${entry.service}`, { description: errorMessage(error) })
+    }
+  })
+
+  return (
+    <div className="flex items-center justify-between gap-3 rounded-lg border border-border bg-muted/40 px-3 py-2">
+      <div className="min-w-0">
+        <p className="flex items-center gap-1.5 text-sm font-medium">
+          <span className="inline-block size-1.5 shrink-0 rounded-full bg-amber-500" aria-hidden />
+          {entry.service}
+        </p>
+        <p className="truncate font-mono text-xs text-muted-foreground">{entry.fingerprint}</p>
+      </div>
+      <div className="flex shrink-0 items-center gap-2">
+        <Button size="xs" variant="outline" onPress={() => void deny.run()} isDisabled={deny.pending}>
+          {deny.pending ? <LoaderCircle className="animate-spin" /> : <X />}
+          Ignore
+        </Button>
+        <Button size="xs" onPress={() => void approve.run()} isDisabled={approve.pending}>
+          {approve.pending ? <LoaderCircle className="animate-spin" /> : <Check />}
+          Authorize
+        </Button>
+      </div>
+    </div>
+  )
+}
+
+function AuthorizedRow({ entry, onDone }: { entry: PeerAuthorized; onDone: () => void }) {
+  const revoke = useAsyncAction(async () => {
+    try {
+      await revokePeer(entry.service, entry.fingerprint)
+      toast.success(`Revoked ${entry.service}`, { description: shortFingerprint(entry.fingerprint) })
+      onDone()
+    } catch (error) {
+      toast.error(`Failed to revoke ${entry.service}`, { description: errorMessage(error) })
+    }
+  })
+
+  return (
+    <div className="flex items-center justify-between gap-3 rounded-lg border border-border px-3 py-2">
+      <div className="min-w-0">
+        <p className="flex items-center gap-1.5 text-sm font-medium">
+          <BadgeCheck className={cn('size-4', 'text-emerald-500')} aria-hidden />
+          {entry.service}
+        </p>
+        <p className="truncate font-mono text-xs text-muted-foreground">
+          {entry.fingerprint}
+          <span className="ml-2 text-muted-foreground/70">by {entry.approved_by}</span>
+        </p>
+      </div>
+      <Button
+        size="xs"
+        variant="destructive"
+        onPress={() => void revoke.run()}
+        isDisabled={revoke.pending}
+      >
+        {revoke.pending ? <LoaderCircle className="animate-spin" /> : <X />}
+        Revoke
+      </Button>
+    </div>
+  )
+}

src/frontend/src/lib/api/peers.ts

@@ -0,0 +1,39 @@
+/**
+ * Copyright (C) 2026 Dcntrlized
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { get, post } from './client'
+import type { PeerAttestation, PeerTrustState } from '../types'
+
+/** Fetches the pending + approved peer trust state (security theme M2 §3). */
+export function fetchTrustState(): Promise<PeerTrustState> {
+  return get<PeerTrustState>('/api/peers')
+}
+
+/** Fetches the auth service's public signing key attestation. */
+export function fetchAttestation(): Promise<PeerAttestation> {
+  return get<PeerAttestation>('/api/peers/attestation')
+}
+
+/** Approves a peer's fingerprint in the auth service's trust store. */
+export function approvePeer(service: string, fingerprint: string): Promise<void> {
+  return post<void>('/api/peers/approve', { service, fingerprint })
+}
+
+/** Revokes a peer's fingerprint (returns it to the no-op path immediately). */
+export function revokePeer(service: string, fingerprint: string): Promise<void> {
+  return post<void>('/api/peers/revoke', { service, fingerprint })
+}

src/frontend/src/lib/types.ts

@@ -102,3 +102,34 @@ export interface FilterOption {
   label: string
   hint: string
 }
+
+/** A first-contact authorization request waiting for the instance owner (security theme M2 §3). */
+export interface PeerPending {
+  service: string
+  fingerprint: string
+  first_seen: string
+  last_seen: string
+}
+
+/** An approved peer row of the auth service's trust store. */
+export interface PeerAuthorized {
+  service: string
+  fingerprint: string
+  approved_by: string
+  approved_at: string
+  revoked_at?: string | null
+}
+
+/** Combined pending + approved trust state served by GET /api/peers. */
+export interface PeerTrustState {
+  pending: PeerPending[]
+  authorized: PeerAuthorized[]
+}
+
+/** The auth service's public signing key statement (GET /api/peers/attestation). */
+export interface PeerAttestation {
+  public_key: string
+  fingerprint: string
+  kid: string
+  issued_at: string
+}

src/handlers/peers/peers.go

@@ -0,0 +1,146 @@
+// Copyright (C) 2026 Dcntrlized
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+// Package peers serves the trusted-services surface: pending first-contact
+// authorizations and the approve/revoke actions for the instance owner
+// (security theme M2 §3). Maestro is the UI; the auth service owns the
+// enforcement.
+package peers
+
+import (
+	"encoding/json"
+	"net/http"
+	"sync"
+
+	"git.dcntrlized.org/Dcntrlized/Maestro/lib/authmgmt"
+)
+
+// Handler wraps a lazily-initialized auth management client so identity
+// issuance happens once per process, not per request.
+type Handler struct {
+	mu     sync.Mutex
+	client *authmgmt.Client
+}
+
+// NewHandler creates the peers handler. The underlying mTLS client is
+// constructed on first use.
+func NewHandler() *Handler {
+	return &Handler{}
+}
+
+// List serves GET /api/peers — the combined pending + approved trust state.
+func (h *Handler) List(w http.ResponseWriter, r *http.Request) {
+	client, err := h.ensureClient()
+	if err != nil {
+		http.Error(w, "auth management client unavailable: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+	state, err := client.TrustState(r.Context())
+	if err != nil {
+		http.Error(w, "failed to read trust state: "+err.Error(), http.StatusBadGateway)
+		return
+	}
+	writeJSON(w, http.StatusOK, state)
+}
+
+// Attestation serves GET /api/peers/attestation — the auth service's public
+// signing key and its pinnable fingerprint.
+func (h *Handler) Attestation(w http.ResponseWriter, r *http.Request) {
+	client, err := h.ensureClient()
+	if err != nil {
+		http.Error(w, "auth management client unavailable: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+	att, err := client.Attestation(r.Context())
+	if err != nil {
+		http.Error(w, "failed to read attestation: "+err.Error(), http.StatusBadGateway)
+		return
+	}
+	writeJSON(w, http.StatusOK, att)
+}
+
+type authzAction struct {
+	Service     string `json:"service"`
+	Fingerprint string `json:"fingerprint"`
+}
+
+// Approve serves POST /api/peers/approve — forwards the owner's approval to
+// the auth service's trust store.
+func (h *Handler) Approve(w http.ResponseWriter, r *http.Request) {
+	var action authzAction
+	if !decodeAction(r, w, &action) {
+		return
+	}
+	client, err := h.ensureClient()
+	if err != nil {
+		http.Error(w, "auth management client unavailable: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+	if err := client.Approve(r.Context(), action.Service, action.Fingerprint); err != nil {
+		http.Error(w, "failed to approve peer: "+err.Error(), http.StatusBadGateway)
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]string{"status": "approved"})
+}
+
+// Revoke serves POST /api/peers/revoke — forwards the owner's revocation
+// (returns the peer to the no-op path immediately).
+func (h *Handler) Revoke(w http.ResponseWriter, r *http.Request) {
+	var action authzAction
+	if !decodeAction(r, w, &action) {
+		return
+	}
+	client, err := h.ensureClient()
+	if err != nil {
+		http.Error(w, "auth management client unavailable: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+	if err := client.Revoke(r.Context(), action.Service, action.Fingerprint); err != nil {
+		http.Error(w, "failed to revoke peer: "+err.Error(), http.StatusBadGateway)
+		return
+	}
+	writeJSON(w, http.StatusOK, map[string]string{"status": "revoked"})
+}
+
+func (h *Handler) ensureClient() (*authmgmt.Client, error) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	if h.client == nil {
+		client, err := authmgmt.New()
+		if err != nil {
+			return nil, err
+		}
+		h.client = client
+	}
+	return h.client, nil
+}
+
+func decodeAction(r *http.Request, w http.ResponseWriter, out *authzAction) bool {
+	if err := json.NewDecoder(r.Body).Decode(out); err != nil {
+		http.Error(w, "invalid request body", http.StatusBadRequest)
+		return false
+	}
+	if out.Service == "" || out.Fingerprint == "" {
+		http.Error(w, "service and fingerprint are required", http.StatusBadRequest)
+		return false
+	}
+	return true
+}
+
+func writeJSON(w http.ResponseWriter, status int, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	_ = json.NewEncoder(w).Encode(v)
+}

src/lib/authmgmt/client.go

@@ -0,0 +1,238 @@
+// Copyright (C) 2026 Dcntrlized
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+// Package authmgmt is Maestro's client for the shared auth service's
+// management endpoints (security theme M2 §3). Maestro is only the CA and the
+// UI here: it lists pending first-contact requests, forwards the owner's
+// approve/revoke decisions to the auth service, and reads its key
+// attestation. Enforcement always stays inside the auth service (D5).
+package authmgmt
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"path/filepath"
+	"time"
+
+	"git.dcntrlized.org/Dcntrlized/Maestro/lib/logger"
+	"git.dcntrlized.org/Dcntrlized/Maestro/lib/pki"
+)
+
+// AuthServiceURL is the default DNS name of the shared auth service on the
+// dcntrlized network. The auth service listens with ClientAuth=RequireAndVerify
+// trusting the instance CA (M2 §1).
+const AuthServiceURL = "https://dcntrlized-auth:8080"
+
+// Client talks to the auth service over mTLS using Maestro's own identity
+// certificate (CN=maestro), which the auth service's RequireMaestro gate
+// recognizes as the orchestrator.
+type Client struct {
+	baseURL string
+	http    *http.Client
+}
+
+// Attestation is the auth service's public signing key statement (D3): the key
+// a peer should verify access tokens with, plus its TOFU-pinnable fingerprint.
+type Attestation struct {
+	PublicKey   string `json:"public_key"`
+	Fingerprint string `json:"fingerprint"`
+	Kid         string `json:"kid"`
+	IssuedAt    string `json:"issued_at"`
+}
+
+// AuthorizedKey is an approved peer row of the auth service's trust store.
+type AuthorizedKey struct {
+	Service     string  `json:"service"`
+	Fingerprint string  `json:"fingerprint"`
+	ApprovedBy  string  `json:"approved_by"`
+	ApprovedAt  string  `json:"approved_at"`
+	RevokedAt   *string `json:"revoked_at"`
+}
+
+// PendingAuthorization is a first-contact request awaiting the owner's
+// decision.
+type PendingAuthorization struct {
+	Service     string `json:"service"`
+	Fingerprint string `json:"fingerprint"`
+	FirstSeen   string `json:"first_seen"`
+	LastSeen    string `json:"last_seen"`
+}
+
+// TrustState is the combined pending + approved view the dashboard shows.
+type TrustState struct {
+	Pending    []PendingAuthorization `json:"pending"`
+	Authorized []AuthorizedKey        `json:"authorized"`
+}
+
+type authzRequest struct {
+	Service     string `json:"service"`
+	Fingerprint string `json:"fingerprint"`
+}
+
+// New builds the mTLS management client, provisioning Maestro's own identity
+// from the instance CA (the CA holder issues its own orchestrator cert).
+func New() (*Client, error) {
+	dataRoot, err := dataRoot()
+	if err != nil {
+		return nil, fmt.Errorf("resolve data root: %w", err)
+	}
+	ca, err := pki.EnsureCA(dataRoot)
+	if err != nil {
+		return nil, fmt.Errorf("ensure instance CA: %w", err)
+	}
+	identity, err := pki.EnsureServiceIdentity(ca, "maestro")
+	if err != nil {
+		return nil, fmt.Errorf("provision maestro identity: %w", err)
+	}
+
+	cert, err := tls.LoadX509KeyPair(identity.CertPath, identity.KeyPath)
+	if err != nil {
+		return nil, fmt.Errorf("load maestro identity: %w", err)
+	}
+	pool := x509.NewCertPool()
+	if !pool.AppendCertsFromPEM(ca.CertPEM) {
+		return nil, fmt.Errorf("no certificates parsed from instance CA")
+	}
+
+	baseURL := os.Getenv("AUTH_SERVICE_URL")
+	if baseURL == "" {
+		baseURL = AuthServiceURL
+	}
+
+	return &Client{
+		baseURL: baseURL,
+		http: &http.Client{
+			Timeout: 10 * time.Second,
+			Transport: &http.Transport{
+				TLSClientConfig: &tls.Config{
+					Certificates: []tls.Certificate{cert},
+					RootCAs:      pool,
+					MinVersion:   tls.VersionTLS12,
+				},
+			},
+		},
+	}, nil
+}
+
+// TrustState returns the pending authorizations and the approved trust store.
+func (c *Client) TrustState(ctx context.Context) (*TrustState, error) {
+	var state TrustState
+	if err := c.do(ctx, http.MethodGet, "/internal/pending", nil, &state); err != nil {
+		return nil, err
+	}
+	return &state, nil
+}
+
+// Attestation returns the auth service's public key statement.
+func (c *Client) Attestation(ctx context.Context) (*Attestation, error) {
+	var att Attestation
+	if err := c.do(ctx, http.MethodGet, "/internal/attestation", nil, &att); err != nil {
+		return nil, err
+	}
+	return &att, nil
+}
+
+// Approve forwards the owner's approval for a peer's fingerprint to the auth
+// service's own trust store.
+func (c *Client) Approve(ctx context.Context, service, fingerprint string) error {
+	return c.do(ctx, http.MethodPost, "/internal/authorizations",
+		authzRequest{Service: service, Fingerprint: fingerprint}, nil)
+}
+
+// Revoke forwards the owner's revocation for a peer's fingerprint (returns the
+// peer to the no-op path immediately).
+func (c *Client) Revoke(ctx context.Context, service, fingerprint string) error {
+	return c.do(ctx, http.MethodPost, "/internal/revoke",
+		authzRequest{Service: service, Fingerprint: fingerprint}, nil)
+}
+
+func (c *Client) do(ctx context.Context, method, path string, body, out any) error {
+	var payload []byte
+	if body != nil {
+		payload, _ = json.Marshal(body)
+	}
+	req, err := http.NewRequestWithContext(ctx, method, c.baseURL+path, bytes.NewReader(payload))
+	if err != nil {
+		return err
+	}
+	if body != nil {
+		req.Header.Set("Content-Type", "application/json")
+	}
+
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return fmt.Errorf("auth service %s %s: %w", method, path, err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("auth service %s %s: status %d", method, path, resp.StatusCode)
+	}
+	if out != nil {
+		if err := json.NewDecoder(resp.Body).Decode(out); err != nil {
+			return fmt.Errorf("decode auth service response: %w", err)
+		}
+	}
+	return nil
+}
+
+// RevokeServiceBestEffort revokes a peer's authorization in the auth service
+// trust store, logging and swallowing failures: uninstall must proceed even
+// when the auth service is down (M2 §3 step 5 — "or automatically on
+// uninstall").
+func RevokeServiceBestEffort(ctx context.Context, service, fingerprint string) {
+	client, err := New()
+	if err != nil {
+		bestEffort(err, "build client for revoking "+service)
+		return
+	}
+	if err := client.Revoke(ctx, service, fingerprint); err != nil {
+		bestEffort(err, "revoke "+service)
+	}
+}
+
+// dataRoot resolves the directory storing the instance PKI, mirroring the
+// containers package's resolution (DCNTRLIZED_INSTALL_DIR → XDG → HOME). Kept
+// local to avoid an import cycle: containers imports authmgmt for the
+// uninstall-revoke hook.
+func dataRoot() (string, error) {
+	if dir := os.Getenv("DCNTRLIZED_INSTALL_DIR"); dir != "" {
+		return dir, nil
+	}
+	if xdg := os.Getenv("XDG_DATA_HOME"); xdg != "" {
+		return filepath.Join(xdg, ".dcntrlized"), nil
+	}
+	if xdgHome := os.Getenv("XDG_HOME_DIR"); xdgHome != "" {
+		return filepath.Join(xdgHome, ".dcntrlized"), nil
+	}
+	if home := os.Getenv("HOME"); home != "" {
+		return filepath.Join(home, ".dcntrlized"), nil
+	}
+	return filepath.Join("/data", ".dcntrlized"), nil
+}
+
+// bestEffort logs-and-continues: management calls must never take down the
+// orchestrator (e.g. uninstall revoking while the auth service is down).
+func bestEffort(err error, what string) {
+	if err != nil {
+		logger.Warn("authmgmt: %s failed (best-effort): %v", what, err)
+	}
+}

src/lib/containers/uninstall.go

@@ -21,6 +21,7 @@ import (
 	"os"
 	"strings"
 
+	"git.dcntrlized.org/Dcntrlized/Maestro/lib/authmgmt"
 	"git.dcntrlized.org/Dcntrlized/Maestro/lib/docker"
 	"git.dcntrlized.org/Dcntrlized/Maestro/lib/logger"
 	"git.dcntrlized.org/Dcntrlized/Maestro/lib/pki"
@@ -48,10 +49,16 @@ func UninstallContainer(ctx context.Context, item types.RegistryContainer) error
 
 	// Revoke the service's identity certificate and publish the CRL entry
 	// (security theme M1 §2 / M3 §2). A revoked service stops authenticating
-	// on the mTLS edges within one CRL freshness window.
+	// on the mTLS edges within one CRL freshness window. The authorization in
+	// the auth service's trust store is revoked too (M2 §3 step 5) — the
+	// fingerprint is read before the identity files are removed.
+	fingerprint := serviceFingerprint(serviceName)
 	if err := revokeServiceIdentity(serviceName); err != nil {
 		logger.Warn("Failed to revoke identity for %s: %v", serviceName, err)
 	}
+	if fingerprint != "" {
+		authmgmt.RevokeServiceBestEffort(ctx, serviceName, fingerprint)
+	}
 
 	if _, err := os.Stat(targetDir); err == nil {
 		// Stop and remove the project containers/networks via compose down when
@@ -92,6 +99,21 @@ func UninstallContainer(ctx context.Context, item types.RegistryContainer) error
 	return nil
 }
 
+// serviceFingerprint reads the service's identity fingerprint (the public key
+// fingerprint the auth service's trust store is keyed on), or "" when the
+// identity was never issued.
+func serviceFingerprint(serviceName string) string {
+	dataRoot, err := getDataRoot()
+	if err != nil {
+		return ""
+	}
+	meta, err := pki.LoadServiceMeta(dataRoot, serviceName)
+	if err != nil {
+		return ""
+	}
+	return meta.Fingerprint
+}
+
 // revokeServiceIdentity revokes the service's certificate in the instance CA.
 // Best-effort: uninstall proceeds even if the CA or identity is missing.
 func revokeServiceIdentity(serviceName string) error {

src/lib/pki/identity.go

@@ -72,6 +72,12 @@ func HasServiceIdentity(dataRoot, serviceName string) bool {
 	return err == nil
 }
 
+// LoadServiceMeta reads a service's identity issuance record without touching
+// the CA. It returns an error when the identity has not been issued yet.
+func LoadServiceMeta(dataRoot, serviceName string) (ServiceMeta, error) {
+	return readMeta(ServiceDir(dataRoot, serviceName))
+}
+
 // EnsureServiceIdentity loads the service's leaf identity, issuing a fresh one
 // when missing or expiring within the refresh window. Issuance is idempotent
 // and safe to call before every start/install.

src/lib/pki/logs/debug.log

@@ -1,3 +0,0 @@
-========== Start Log ==========
-[INFO] Logger initialized
-[2026-08-15T23:09:40+01:00]

src/lib/pki/logs/error.log

@@ -1,3 +0,0 @@
-========== Start Log ==========
-[INFO] Logger initialized
-[2026-08-15T23:09:40+01:00]

src/lib/pki/logs/info.log

@@ -1,4 +0,0 @@
-========== Start Log ==========
-[INFO] Logger initialized
-[2026-08-15T23:09:40+01:00]
-INFO: 2026/08/15 22:09:40 pki: refreshing expiring identity for keepnote

src/lib/pki/logs/warn.log

@@ -1,3 +0,0 @@
-========== Start Log ==========
-[INFO] Logger initialized
-[2026-08-15T23:09:40+01:00]

src/main.go

@@ -25,6 +25,7 @@ import (
 
 	"git.dcntrlized.org/Dcntrlized/Maestro/handlers/actions"
 	"git.dcntrlized.org/Dcntrlized/Maestro/handlers/containers"
+	"git.dcntrlized.org/Dcntrlized/Maestro/handlers/peers"
 	handlers "git.dcntrlized.org/Dcntrlized/Maestro/handlers/registry"
 	libcontainers "git.dcntrlized.org/Dcntrlized/Maestro/lib/containers"
 	"git.dcntrlized.org/Dcntrlized/Maestro/lib/docker"
@@ -92,6 +93,15 @@ func main() {
 	mux.HandleFunc("/api/actions/{containerId}/{actionName}", actions.RunAction)
 	mux.HandleFunc("/api/registry", handlers.GetRegistry)
 
+	// Trusted-services surface (security theme M2 §3): pending first-contact
+	// authorizations and the owner's approve/revoke actions, forwarded to the
+	// auth service's own trust store.
+	peersHandler := peers.NewHandler()
+	mux.HandleFunc("/api/peers", peersHandler.List)
+	mux.HandleFunc("/api/peers/attestation", peersHandler.Attestation)
+	mux.HandleFunc("/api/peers/approve", peersHandler.Approve)
+	mux.HandleFunc("/api/peers/revoke", peersHandler.Revoke)
+
 	if os.Getenv("DEV_MODE") != "true" {
 		frontendDir, err := fs.Sub(embeddedFrontend, "frontend/dist")
 		if err != nil {