improvement(secrets): gate Copilot code mounting at use level

apps/docs/content/docs/en/platform/credentials.mdx

@@ -91,15 +91,17 @@ Both masking and model-bound projection match only exact values in either case.
 
 ### Copilot code execution
 
-Copilot's Function and code-execution tools receive a saved secret only when their code explicitly contains a valid `{{KEY}}` reference. Direct `environmentVariables.KEY` access, shell `$KEY`, dynamic names, literals, and configured-but-unused secrets do not mount a value. Code execution requires workspace write access, and the caller must also be allowed to view the raw value: your own Personal secrets, any secret for which you are a Credential Admin, and Workspace secrets when you are a workspace admin. Credential Members can continue using shared secrets through normal workflow and tool resolution, but cannot mount their plaintext into arbitrary Copilot code.
+Copilot's Function and code-execution tools receive a saved secret only when their code explicitly contains a valid `{{KEY}}` reference. Direct `environmentVariables.KEY` access, shell `$KEY`, dynamic names, literals, and configured-but-unused secrets do not mount a value. Code execution requires workspace write access, and the caller must be allowed to **use** the secret — the same set a workflow resolves for them: your own Personal secrets, and Workspace secrets you hold an active grant on as a Credential Member or Credential Admin, which a workspace admin holds on every key. A secret you hold no grant on does not mount, and neither does one whose grant is revoked or still pending.
+
+This matches what a workflow Function block already resolves for the same person, deliberately. Being able to run a secret is not the same as being able to read it: the value stays masked under **Settings → Secrets**, and **See usage** stays visible only to that secret's admins, so a Credential Member using a secret in code is recorded for whoever can rotate it.
 
 Headless surfaces use their saved **Secret access** setting:
 
 - **Sim Chat block** — under **Show additional fields**
 - **Scheduled Tasks** — in the task modal
 - **Inbox** — under **Settings → Inbox → Secrets**
 
-Choose **All secrets** or **Selected secrets**. Existing configurations default to **All secrets** for compatibility. **All secrets** still means only secrets explicitly referenced with `{{KEY}}` that the execution actor may view; it never injects the full environment. Inbox messages from allowed external senders do not receive raw-secret access.
+Choose **All secrets** or **Selected secrets**. Existing configurations default to **All secrets** for compatibility. **All secrets** still means only secrets explicitly referenced with `{{KEY}}` that the execution actor may use; it never injects the full environment. Inbox messages from allowed external senders do not receive raw-secret access at all — an inbound message that Sim cannot match to a workspace member runs with no secret actor, so no `{{KEY}}` resolves for it.
 
 Code receives the real authorized value at runtime. Before any Copilot-visible tool result is returned, exact occurrences of activated secret values are replaced with `{{KEY}}`; local side effects and runtime results are not rewritten. Encoded, hashed, URL-encoded, otherwise transformed, or network-exfiltrated values cannot be inferred and masked reliably, so code should not deliberately return, transform, print, or transmit secrets to unintended destinations.
 
@@ -139,10 +141,11 @@ Usage is recorded independently of execution logs, so it outlives them: logs exp
 
 | | Workspace | Personal |
 |---|---|---|
-| **Visibility** | All workspace members, including external workspace members | Only you |
-| **Use in workflows** | Any member can use | Only you can use |
+| **Who sees the name** | All workspace members, including external workspace members | Only you |
+| **Who sees the value** | Workspace admins and that secret's Credential Admins | Only you |
+| **Use in workflows and code** | Any member can use | Only you can use |
 | **Best for** | Production workflows, shared services | Testing, personal API keys |
-| **Who can edit** | Workspace admins | Only you |
+| **Who can edit** | Workspace admins and that secret's Credential Admins | Only you |
 
 <Callout type="info">
 When a workspace secret and a personal secret share the same key name, the **workspace secret takes precedence**.

apps/sim/lib/copilot/tools/secret-mount-materializer.server.test.ts

@@ -221,10 +221,38 @@ describe('materializeCopilotCodeSecrets', () => {
     expect(result.envVars).toEqual({ API_KEY: 'plain:workspace-cipher' })
   })
 
+  /**
+   * Use-level on purpose: a workflow Function block resolves the same secret for the same
+   * member, and Copilot can author and run such a workflow itself. The admin bar stays on the
+   * Settings mask and the usage trail, which Copilot cannot route around.
+   */
+  it('lets an active per-secret member mount a workspace secret', async () => {
+    queueSources({
+      workspace: { API_KEY: 'workspace-cipher' },
+      credentials: [
+        credentialRow({
+          type: 'env_workspace',
+          envKey: 'API_KEY',
+          role: 'member',
+          status: 'active',
+        }),
+      ],
+    })
+
+    const result = await materializeCopilotCodeSecrets({
+      actorUserId: 'user-1',
+      workspaceId: 'workspace-1',
+      requestedNames: ['API_KEY'],
+    })
+
+    expect(result.envVars).toEqual({ API_KEY: 'plain:workspace-cipher' })
+  })
+
   it.each([
-    ['member', 'active'],
     ['admin', 'revoked'],
     ['admin', 'pending'],
+    ['member', 'revoked'],
+    ['member', 'pending'],
   ] as const)('denies a workspace secret for a %s/%s credential grant', async (role, status) => {
     queueSources({
       workspace: { API_KEY: 'workspace-cipher' },
@@ -263,7 +291,7 @@ describe('materializeCopilotCodeSecrets', () => {
           type: 'env_workspace',
           envKey: 'API_KEY',
           role: 'member',
-          status: 'active',
+          status: 'revoked',
         }),
       ],
     })
@@ -286,7 +314,7 @@ describe('materializeCopilotCodeSecrets', () => {
           type: 'env_workspace',
           envKey: 'API_KEY',
           role: 'member',
-          status: 'active',
+          status: 'revoked',
         }),
       ],
     })
@@ -348,36 +376,64 @@ describe('materializeCopilotCodeSecrets', () => {
     expect(encryptionMockFns.mockDecryptSecret).not.toHaveBeenCalled()
   })
 
-  it('mounts another owner personal secret only for an active per-secret admin', async () => {
+  it.each(['admin', 'member'] as const)(
+    'mounts another owner personal secret for an active per-secret %s',
+    async (role) => {
+      queueSources({
+        credentials: [
+          credentialRow({
+            type: 'env_personal',
+            envKey: 'SHARED_KEY',
+            envOwnerUserId: 'owner-2',
+            role,
+            status: 'active',
+            encryptedValue: 'shared-cipher',
+            encryptedValueBytes: 13,
+          }),
+        ],
+      })
+
+      const result = await materializeCopilotCodeSecrets({
+        actorUserId: 'user-1',
+        workspaceId: 'workspace-1',
+        requestedNames: ['SHARED_KEY'],
+      })
+
+      expect(result.envVars).toEqual({ SHARED_KEY: 'plain:shared-cipher' })
+      /**
+       * The usage trail is read per owner, so a borrowed secret has to be filed under the
+       * sharer. Attributing it to the actor would surface it under the actor's own
+       * same-named secret and hide it from the person who can actually rotate it.
+       */
+      expect(result.catalogEntries).toEqual([
+        expect.objectContaining({ name: 'SHARED_KEY', scope: 'personal', ownerUserId: 'owner-2' }),
+      ])
+    }
+  )
+
+  it('does not mount another owner personal secret on a revoked grant', async () => {
     queueSources({
       credentials: [
         credentialRow({
           type: 'env_personal',
           envKey: 'SHARED_KEY',
           envOwnerUserId: 'owner-2',
-          role: 'admin',
-          status: 'active',
+          role: 'member',
+          status: 'revoked',
           encryptedValue: 'shared-cipher',
           encryptedValueBytes: 13,
         }),
       ],
     })
 
-    const result = await materializeCopilotCodeSecrets({
-      actorUserId: 'user-1',
-      workspaceId: 'workspace-1',
-      requestedNames: ['SHARED_KEY'],
-    })
-
-    expect(result.envVars).toEqual({ SHARED_KEY: 'plain:shared-cipher' })
-    /**
-     * The usage trail is read per owner, so a borrowed secret has to be filed under the
-     * sharer. Attributing it to the actor would surface it under the actor's own
-     * same-named secret and hide it from the person who can actually rotate it.
-     */
-    expect(result.catalogEntries).toEqual([
-      expect.objectContaining({ name: 'SHARED_KEY', scope: 'personal', ownerUserId: 'owner-2' }),
-    ])
+    await expect(
+      materializeCopilotCodeSecrets({
+        actorUserId: 'user-1',
+        workspaceId: 'workspace-1',
+        requestedNames: ['SHARED_KEY'],
+      })
+    ).rejects.toThrow('Copilot code cannot access the requested secret: SHARED_KEY')
+    expect(encryptionMockFns.mockDecryptSecret).not.toHaveBeenCalled()
   })
 
   it('uses the current encrypted value on every call so rotation is observed', async () => {

apps/sim/lib/copilot/tools/secret-mount-materializer.server.ts

@@ -125,8 +125,22 @@ function overLimitNames(row: { overLimitNames?: unknown } | undefined): Set<stri
   return new Set(row.overLimitNames.filter((name): name is string => typeof name === 'string'))
 }
 
-function activeAdmin(row: CredentialAccessRow): boolean {
-  return row.role === 'admin' && row.status === 'active'
+/**
+ * Whether the actor holds a live grant on this credential, at any role.
+ *
+ * Deliberately looser than the credential-admin predicate that reveals a value under
+ * Settings → Secrets, and deliberately equal to what a workflow resolves. A Function block
+ * reads the same secret at use level through {@link getPersonalAndWorkspaceEnv}, and Copilot
+ * reaches that path itself via `edit_workflow` + `run_workflow`, so an admin-only bar here
+ * contained nothing — it redirected a member through a detour that mutates a persisted
+ * workflow, while the direct path is ephemeral and files a usage row. The view gate stays
+ * where it can still hold: the Settings mask and the usage trail.
+ *
+ * Rechecked in memory even though the query already filters on it, so a later edit to that
+ * `where` cannot silently widen this.
+ */
+function activeGrant(row: CredentialAccessRow): boolean {
+  return row.status === 'active'
 }
 
 function unavailableError(names: readonly string[]): CopilotCodeSecretAccessError {
@@ -204,7 +218,6 @@ export async function materializeCopilotCodeSecrets(params: {
           eq(credential.workspaceId, params.workspaceId),
           inArray(credential.type, ['env_workspace', 'env_personal']),
           inArray(credential.envKey, requestedNames),
-          eq(credentialMember.role, 'admin'),
           eq(credentialMember.status, 'active'),
           or(
             eq(credential.type, 'env_workspace'),
@@ -230,7 +243,7 @@ export async function materializeCopilotCodeSecrets(params: {
       row.type === 'env_personal' &&
       row.envOwnerUserId !== null &&
       row.envOwnerUserId !== params.actorUserId &&
-      activeAdmin(row)
+      activeGrant(row)
   )
 
   const authorizedSources: AuthorizedEncryptedSecret[] = []
@@ -243,7 +256,7 @@ export async function materializeCopilotCodeSecrets(params: {
       workspaceExists &&
       (access.canAdmin ||
         envCredentialRows.some(
-          (row) => row.type === 'env_workspace' && row.envKey === name && activeAdmin(row)
+          (row) => row.type === 'env_workspace' && row.envKey === name && activeGrant(row)
         ))
 
     if (workspaceAuthorized) {