From 6d89c1afdeec8667480c02dc5e23492a044d13ba Mon Sep 17 00:00:00 2001
From: Teknium <127238744+teknium1@users.noreply.github.com>
Date: Thu, 10 Sep 2026 04:31:58 -0700
Subject: [PATCH] feat(plugins): pin a plugin to a commit from Desktop, and
 show pins in every list

Only the CLI could install a plugin at an exact commit (`--ref <sha>`); the
Desktop "Install from Git" dialog, the TUI gateway `plugins.manage install`
method and the dashboard `/agent-plugins/install` endpoint all called
`_install_plugin_core` without a ref, so a team that wanted everyone on the
same private-plugin commit had to leave the app for a terminal.

- `dashboard_install_plugin(ref=)` threads the pin to `_install_plugin_core`;
  the 40-hex validation and HEAD verification are unchanged. The gateway
  method and dashboard body accept `ref`.
- Desktop dialog gains an optional "Pin to commit" field (custom sources only,
  client-side 40-hex check disables Install on anything shorter).
- `plugins.manage list` rows carry `pinned_sha`; the Desktop plugins tab shows
  a `pinned @ <sha8>` badge and `hermes plugins list` prints `git pinned@<sha8>`
  in Source, so a team can eyeball that everyone runs the same commit.
---
 .../settings/plugin-install-modal.test.tsx    | 23 +++++++++++
 .../src/app/settings/plugin-install-modal.tsx | 38 +++++++++++++++++--
 apps/desktop/src/app/skills/plugins-tab.tsx   |  7 ++++
 apps/desktop/src/i18n/en.ts                   |  8 ++++
 apps/desktop/src/i18n/ru.ts                   |  5 +++
 apps/desktop/src/i18n/types.ts                |  6 +++
 apps/desktop/src/i18n/zh.ts                   |  7 ++++
 apps/desktop/src/store/agent-plugins.ts       | 10 ++++-
 hermes_cli/plugins_cmd.py                     | 27 +++++++++++--
 hermes_cli/web_models.py                      |  2 +
 hermes_cli/web_routers/dashboard_ui.py        |  2 +-
 .../test_plugins_manage_install.py            |  2 +
 .../test_plugins_manage_install_ref.py        | 24 ++++++++++++
 tui_gateway/methods_tools.py                  |  7 +++-
 website/docs/user-guide/desktop.md            |  5 ++-
 website/docs/user-guide/features/plugins.md   |  7 ++++
 16 files changed, 168 insertions(+), 12 deletions(-)
 create mode 100644 tests/tui_gateway/test_plugins_manage_install_ref.py

diff --git a/apps/desktop/src/app/settings/plugin-install-modal.test.tsx b/apps/desktop/src/app/settings/plugin-install-modal.test.tsx
index 3db67fe2f1..6b8ca1a0c5 100644
--- a/apps/desktop/src/app/settings/plugin-install-modal.test.tsx
+++ b/apps/desktop/src/app/settings/plugin-install-modal.test.tsx
@@ -111,4 +111,27 @@ describe('Install from Git entry flow', () => {
     expect(requestGateway).not.toHaveBeenCalledWith('plugins.manage', expect.objectContaining({ action: 'install' }))
     expect(installDesktopPlugin).not.toHaveBeenCalled()
   })
+
+  it('pins a custom install to a full commit SHA and refuses anything shorter', async () => {
+    probePluginRepo.mockResolvedValue({ ok: true, agent: true, desktop: false, warnings: [] })
+    requestGateway.mockImplementation(async (method: string) =>
+      method === 'plugins.manage' ? { ok: true, plugin_name: 'plugin', plugins: [] } : { plugins: [] }
+    )
+    renderFlow()
+    act(() => openPluginInstallRequest({ repo: 'https://github.com/example/plugin' }))
+    const pin = await screen.findByRole('textbox', { name: 'Pin to commit (optional)' })
+    const install = screen.getByRole('button', { name: 'Install' }) as HTMLButtonElement
+    fireEvent.change(pin, { target: { value: 'main' } })
+    expect(install.disabled).toBe(true)
+    const sha = 'ABCDEF0123456789abcdef0123456789abcdef01'
+    fireEvent.change(pin, { target: { value: ` ${sha} ` } })
+    expect(install.disabled).toBe(false)
+    fireEvent.click(install)
+    await waitFor(() =>
+      expect(requestGateway).toHaveBeenCalledWith(
+        'plugins.manage',
+        expect.objectContaining({ action: 'install', ref: sha.toLowerCase() })
+      )
+    )
+  })
 })
diff --git a/apps/desktop/src/app/settings/plugin-install-modal.tsx b/apps/desktop/src/app/settings/plugin-install-modal.tsx
index 83fb8ee080..92cc4b8066 100644
--- a/apps/desktop/src/app/settings/plugin-install-modal.tsx
+++ b/apps/desktop/src/app/settings/plugin-install-modal.tsx
@@ -22,7 +22,7 @@ import { useI18n } from '@/i18n'
 import { ExternalLink } from '@/lib/external-link'
 import { AlertTriangle } from '@/lib/icons'
 import { resolvePluginSourceLinks } from '@/lib/plugin-source-urls'
-import { installAgentPlugin, loadAgentPlugins } from '@/store/agent-plugins'
+import { COMMIT_SHA_RE, installAgentPlugin, loadAgentPlugins } from '@/store/agent-plugins'
 import { notify } from '@/store/notifications'
 import {
   $pluginInstallRequest,
@@ -57,6 +57,7 @@ export function PluginInstallModal() {
   const [installDesktop, setInstallDesktop] = useState(true)
   const [enableAgent, setEnableAgent] = useState(true)
   const [forceReinstall, setForceReinstall] = useState(false)
+  const [pinRef, setPinRef] = useState('')
   const [installing, setInstalling] = useState(false)
   const [installError, setInstallError] = useState<string | null>(null)
   const probeToken = useRef(0)
@@ -69,6 +70,7 @@ export function PluginInstallModal() {
     setInstallDesktop(true)
     setEnableAgent(true)
     setForceReinstall(false)
+    setPinRef('')
     setInstalling(false)
     setInstallError(null)
   }, [])
@@ -195,6 +197,7 @@ export function PluginInstallModal() {
           force: forceReinstall,
           enable: enableAgent,
           catalogName: request.catalogName,
+          ref: pinRefTrimmed || undefined,
           profile: request.profile
         })
 
@@ -280,6 +283,8 @@ export function PluginInstallModal() {
 
   const open = request !== null && !onSettings
   const busy = phase === 'probing' || installing
+  const pinRefTrimmed = pinRef.trim().toLowerCase()
+  const pinRefInvalid = pinRefTrimmed !== '' && !COMMIT_SHA_RE.test(pinRefTrimmed)
 
   return (
     <Dialog
@@ -433,7 +438,9 @@ export function PluginInstallModal() {
                       className="mt-0.5 size-3.5 shrink-0 text-amber-600 dark:text-amber-400"
                     />
                     <span>
-                      {[...(probe.warnings ?? []), probe.insecure ? m.insecureWarning : ''].filter(Boolean).join(' ')}
+                      {[...new Set([...(probe.warnings ?? []), probe.insecure ? m.insecureWarning : ''])]
+                        .filter(Boolean)
+                        .join(' ')}
                     </span>
                   </div>
                 )}
@@ -455,6 +462,28 @@ export function PluginInstallModal() {
                     <Switch checked={forceReinstall} disabled={busy} onCheckedChange={setForceReinstall} />
                   </label>
                 )}
+
+                {!request.catalogName && probe.agent && (
+                  <label className="block space-y-1">
+                    <span className="text-[length:var(--conversation-caption-font-size)] text-foreground">
+                      {m.pinToCommit}
+                    </span>
+                    <Input
+                      aria-invalid={pinRefInvalid || undefined}
+                      aria-label={m.pinToCommit}
+                      disabled={busy || !installAgent}
+                      onChange={event => setPinRef(event.target.value)}
+                      placeholder={m.pinToCommitPlaceholder}
+                      spellCheck={false}
+                      value={pinRef}
+                    />
+                    <span
+                      className={`block text-[length:var(--conversation-caption-font-size)] ${pinRefInvalid ? 'text-destructive' : 'text-(--ui-text-tertiary)'}`}
+                    >
+                      {pinRefInvalid ? m.pinToCommitInvalid : m.pinToCommitHint}
+                    </span>
+                  </label>
+                )}
               </div>
             )}
 
@@ -475,7 +504,10 @@ export function PluginInstallModal() {
               {m.reviewRepository}
             </Button>
           ) : (
-            <Button disabled={busy || phase !== 'ready' || !probe?.ok} onClick={() => void handleInstall()}>
+            <Button
+              disabled={busy || phase !== 'ready' || !probe?.ok || pinRefInvalid}
+              onClick={() => void handleInstall()}
+            >
               {installing ? m.installing : m.install}
             </Button>
           )}
diff --git a/apps/desktop/src/app/skills/plugins-tab.tsx b/apps/desktop/src/app/skills/plugins-tab.tsx
index 2b743f6e83..f0f119ed54 100644
--- a/apps/desktop/src/app/skills/plugins-tab.tsx
+++ b/apps/desktop/src/app/skills/plugins-tab.tsx
@@ -114,6 +114,13 @@ function AgentPluginListRow({
               </span>
             </Tip>
           )}
+          {row.pinned_sha && (
+            <Tip label={t.skills.plugins.pinnedProvenance(row.pinned_sha.slice(0, 8))}>
+              <span className="rounded border border-(--ui-stroke-tertiary) px-1 font-mono text-[0.65rem] text-(--ui-text-tertiary)">
+                {t.skills.plugins.pinnedBadge(row.pinned_sha.slice(0, 8))}
+              </span>
+            </Tip>
+          )}
           {row.update_available && onUpdate && (
             <Button
               className="h-5 px-1.5 text-[0.65rem]"
diff --git a/apps/desktop/src/i18n/en.ts b/apps/desktop/src/i18n/en.ts
index 6b33ab0781..9dc1b8f1b3 100644
--- a/apps/desktop/src/i18n/en.ts
+++ b/apps/desktop/src/i18n/en.ts
@@ -490,6 +490,11 @@ export const en: Translations = {
         gitCloneLabel: 'Git clone URL',
         enableAgent: 'Enable agent plugin after install',
         forceReinstall: 'Force reinstall (replace if already installed)',
+        pinToCommit: 'Pin to commit (optional)',
+        pinToCommitPlaceholder: 'Full 40-character commit SHA',
+        pinToCommitHint:
+          'Everyone installing this SHA gets the same code; the plugin then refuses updates until re-pinned. Leave empty for the latest commit.',
+        pinToCommitInvalid: 'Must be a full 40-character commit SHA (branches and tags are not accepted).',
         install: 'Install',
         installing: 'Installing…',
         probing: 'Inspecting repository…',
@@ -1520,6 +1525,9 @@ export const en: Translations = {
         'Hit "+ Add to this Agent" on any plugin — reviewed entries install at their pinned commit into the selected profile. Bundled agent+desktop plugins offer both halves.',
       alreadyInstalled: (name: string) => `${name} is already installed in this profile.`,
       catalogProvenance: (sha: string) => `Installed from the Hermes catalog${sha ? ` at pin ${sha}` : ''}.`,
+      pinnedProvenance: (sha: string) =>
+        `Pinned to commit ${sha}. Updates are refused until it is reinstalled with a new pin.`,
+      pinnedBadge: (sha: string) => `pinned @ ${sha}`,
       tierOfficial: 'official',
       tierCommunity: 'community',
       updateToPin: (sha: string) => `Update to ${sha}`,
diff --git a/apps/desktop/src/i18n/ru.ts b/apps/desktop/src/i18n/ru.ts
index e089220ff5..99208e7946 100644
--- a/apps/desktop/src/i18n/ru.ts
+++ b/apps/desktop/src/i18n/ru.ts
@@ -458,6 +458,11 @@ export const ru = defineLocale({
         gitCloneLabel: 'URL для git clone',
         enableAgent: 'Включить плагин агента после установки',
         forceReinstall: 'Принудительная переустановка (заменить, если уже установлен)',
+        pinToCommit: 'Закрепить на коммите (необязательно)',
+        pinToCommitPlaceholder: 'Полный SHA коммита (40 символов)',
+        pinToCommitHint:
+          'Все, кто установит этот SHA, получат одинаковый код; плагин перестанет обновляться до смены пина. Оставьте пустым для последнего коммита.',
+        pinToCommitInvalid: 'Нужен полный SHA коммита из 40 символов (ветки и теги не принимаются).',
         install: 'Установить',
         installing: 'Установка…',
         probing: 'Осмотр репозитория…',
diff --git a/apps/desktop/src/i18n/types.ts b/apps/desktop/src/i18n/types.ts
index eb76fc419b..cd9d401a15 100644
--- a/apps/desktop/src/i18n/types.ts
+++ b/apps/desktop/src/i18n/types.ts
@@ -427,6 +427,10 @@ export interface Translations {
         gitCloneLabel: string
         enableAgent: string
         forceReinstall: string
+        pinToCommit: string
+        pinToCommitPlaceholder: string
+        pinToCommitHint: string
+        pinToCommitInvalid: string
         install: string
         installing: string
         probing: string
@@ -1331,6 +1335,8 @@ export interface Translations {
       catalogHint: string
       alreadyInstalled: (name: string) => string
       catalogProvenance: (sha: string) => string
+      pinnedProvenance: (sha: string) => string
+      pinnedBadge: (sha: string) => string
       tierOfficial: string
       tierCommunity: string
       updateToPin: (sha: string) => string
diff --git a/apps/desktop/src/i18n/zh.ts b/apps/desktop/src/i18n/zh.ts
index 0354377a07..6ea660018e 100644
--- a/apps/desktop/src/i18n/zh.ts
+++ b/apps/desktop/src/i18n/zh.ts
@@ -474,6 +474,11 @@ export const zh: Translations = {
         gitCloneLabel: 'Git 克隆地址',
         enableAgent: '安装后启用智能体插件',
         forceReinstall: '强制重装（替换已存在的安装）',
+        pinToCommit: '固定到提交（可选）',
+        pinToCommitPlaceholder: '完整的 40 位提交 SHA',
+        pinToCommitHint:
+          '安装同一 SHA 的所有人都会得到相同的代码；固定后插件将拒绝更新，直到重新固定。留空则安装最新提交。',
+        pinToCommitInvalid: '必须是完整的 40 位提交 SHA（不接受分支和标签）。',
         install: '安装',
         installing: '正在安装…',
         probing: '正在检查仓库…',
@@ -1690,6 +1695,8 @@ export const zh: Translations = {
         '点击任意插件上的「+ Add to this Agent」— 经过审核的条目会以其固定提交安装到所选配置。捆绑的 agent+桌面插件会同时提供两部分。',
       alreadyInstalled: (name: string) => `${name} 已安装在此配置中。`,
       catalogProvenance: (sha: string) => `从 Hermes 目录安装${sha ? `，固定提交 ${sha}` : ''}。`,
+      pinnedProvenance: (sha: string) => `已固定到提交 ${sha}。重新固定前将拒绝更新。`,
+      pinnedBadge: (sha: string) => `固定 @ ${sha}`,
       tierOfficial: '官方',
       tierCommunity: '社区',
       updateToPin: (sha: string) => `更新到 ${sha}`,
diff --git a/apps/desktop/src/store/agent-plugins.ts b/apps/desktop/src/store/agent-plugins.ts
index 05a40c36ba..2491c246d3 100644
--- a/apps/desktop/src/store/agent-plugins.ts
+++ b/apps/desktop/src/store/agent-plugins.ts
@@ -34,8 +34,13 @@ export interface AgentPluginRow {
   catalog_sha?: string
   /** Installed SHA differs from the catalog pin — an update is available. */
   update_available?: boolean
+  /** Full commit SHA a `--ref` install is pinned to (custom sources; refuses `update`). */
+  pinned_sha?: string
 }
 
+/** A `--ref` pin is a full 40-hex commit SHA; branches and tags are refused server-side. */
+export const COMMIT_SHA_RE = /^[0-9a-f]{40}$/i
+
 export type AgentPluginsStatus = 'idle' | 'loading' | 'ready' | 'error'
 
 /** The recovering `requestGateway` from `useGatewayRequest`. */
@@ -194,6 +199,8 @@ export async function installAgentPlugin(
     /** Curated-catalog install: the backend resolves repo + pinned SHA from
      *  its own plugin-catalog and records provenance in the sidecar. */
     catalogName?: string
+    /** Pin a custom source to one full commit SHA (team-wide reproducible install). */
+    ref?: string
     /** Target profile's HERMES_HOME (null/undefined = backend launch profile). */
     profile?: string | null
   }
@@ -213,7 +220,8 @@ export async function installAgentPlugin(
           identifier: opts.identifier,
           force: Boolean(opts.force),
           enable: opts.enable ?? true,
-          ...(opts.catalogName ? { catalog_name: opts.catalogName } : {})
+          ...(opts.catalogName ? { catalog_name: opts.catalogName } : {}),
+          ...(opts.ref ? { ref: opts.ref } : {})
         },
         opts.profile
       )
diff --git a/hermes_cli/plugins_cmd.py b/hermes_cli/plugins_cmd.py
index 95f781cbe8..4d946012c7 100644
--- a/hermes_cli/plugins_cmd.py
+++ b/hermes_cli/plugins_cmd.py
@@ -446,6 +446,19 @@ def _write_install_metadata(metadata: dict[str, dict[str, object]]) -> None:
         path, json.dumps(metadata, indent=2, sort_keys=True) + "\n", tmp_prefix=f"{path.name}.tmp-")
 
 
+def pinned_revision(name: str, metadata: Optional[dict] = None) -> Optional[str]:
+    """Full SHA a ``--ref`` install of *name* is pinned to, else ``None``."""
+    entry = (metadata if metadata is not None else _read_install_metadata()).get(name)
+    if isinstance(entry, dict) and entry.get("pinned") is True and isinstance(entry.get("revision"), str):
+        return entry["revision"]
+    return None
+
+
+def _pin_annotation(name: str, metadata: dict) -> Optional[str]:
+    sha = pinned_revision(name, metadata)
+    return f"git pinned@{sha[:8]}" if sha else None
+
+
 def _normalize_exact_revision(ref: str) -> str:
     """Lowercase a full 40-hex commit SHA; anything else is a PluginOperationError."""
     if not isinstance(ref, str) or not _EXACT_COMMIT_RE.fullmatch(ref):
@@ -1313,10 +1326,13 @@ def cmd_list(args: Any | None = None) -> None:
     disabled = _get_disabled_set()
     entries = _filter_plugin_entries(entries, args, enabled, disabled)
     from hermes_cli import plugins_cmd_catalog as catalog
-    # Source shows catalog provenance (``catalog:<tier>@<sha8>``); a kill-listed install is flagged.
+    # Source shows catalog provenance (``catalog:<tier>@<sha8>``) or a ``--ref`` pin
+    # (``git pinned@<sha8>``) so a team can eyeball that everyone runs the same commit.
+    pins = _read_install_metadata()
     rows = [
         (name, _plugin_status(name, enabled, disabled, key=key), str(version), description,
-         catalog.catalog_annotation(_dir) or source, catalog.removed_annotation(name, _dir))
+         catalog.catalog_annotation(_dir) or _pin_annotation(name, pins) or source,
+         catalog.removed_annotation(name, _dir))
         for name, version, description, source, _dir, key in entries
     ]
 
@@ -1686,9 +1702,11 @@ def _run_composite_fallback(plugin_keys, plugin_labels, plugin_selected, disable
 
 def dashboard_install_plugin(
     identifier: str, *, force: bool, enable: bool, catalog_name: Optional[str] = None,
+    ref: Optional[str] = None,
 ) -> dict[str, Any]:
     """Non-interactive install for the dashboard/TUI. *catalog_name* installs a curated entry at its
-    pinned SHA (identifier may be empty); every path enforces the kill list (no GUI bypass)."""
+    pinned SHA (identifier may be empty); *ref* pins a custom source to one full commit SHA (same
+    contract as ``--ref``); every path enforces the kill list (no GUI bypass)."""
     from hermes_cli import plugins_cmd_catalog as catalog
     warnings: list[str] = []
     entry = None
@@ -1713,7 +1731,8 @@ def dashboard_install_plugin(
             target, installed_manifest, installed_name = catalog.install_catalog_entry(
                 entry, force=force, allow_removed=True)
         else:
-            target, installed_manifest, installed_name = _install_plugin_core(identifier, force=force)
+            target, installed_manifest, installed_name = _install_plugin_core(
+                identifier, force=force, ref=(ref or "").strip() or None)
     except PluginScanBlocked as exc:
         fields = ("pattern_id", "severity", "category", "file", "line", "description")
         return {
diff --git a/hermes_cli/web_models.py b/hermes_cli/web_models.py
index 61bbdc4ed7..3f4faf5ebd 100644
--- a/hermes_cli/web_models.py
+++ b/hermes_cli/web_models.py
@@ -498,6 +498,8 @@ class _AgentPluginInstallBody(BaseModel):
     enable: bool = True
     # Install by curated-catalog name (resolves repo + pinned SHA server-side).
     catalog_name: Optional[str] = None
+    # Pin a custom source to one full 40-hex commit SHA (same contract as ``--ref``).
+    ref: Optional[str] = None
 
 class _PluginProvidersPutBody(BaseModel):
     memory_provider: Optional[str] = None
diff --git a/hermes_cli/web_routers/dashboard_ui.py b/hermes_cli/web_routers/dashboard_ui.py
index f720ba7457..50e3630b06 100644
--- a/hermes_cli/web_routers/dashboard_ui.py
+++ b/hermes_cli/web_routers/dashboard_ui.py
@@ -204,7 +204,7 @@ async def post_agent_plugin_install(request: Request, body: _AgentPluginInstallB
     if not identifier and not catalog_name:
         raise HTTPException(status_code=400, detail="Provide an identifier or a catalog_name.")
     result = dashboard_install_plugin(
-        identifier, force=body.force, enable=body.enable, catalog_name=catalog_name or None)
+        identifier, force=body.force, enable=body.enable, catalog_name=catalog_name or None, ref=body.ref)
     result = _plugin_action(result, "Install failed.", rescan=True)
     # Strip internal paths from the response
     result.pop("after_install_path", None)
diff --git a/tests/tui_gateway/test_plugins_manage_install.py b/tests/tui_gateway/test_plugins_manage_install.py
index b878986d43..53210b3b7c 100644
--- a/tests/tui_gateway/test_plugins_manage_install.py
+++ b/tests/tui_gateway/test_plugins_manage_install.py
@@ -38,6 +38,7 @@ def test_plugins_manage_install_success():
         force=True,
         enable=False,
         catalog_name=None,
+        ref=None,
     )
 
 
@@ -99,6 +100,7 @@ def test_plugins_manage_install_catalog_name_only():
         force=False,
         enable=False,
         catalog_name="weather-plugin",
+        ref=None,
     )
 
 
diff --git a/tests/tui_gateway/test_plugins_manage_install_ref.py b/tests/tui_gateway/test_plugins_manage_install_ref.py
new file mode 100644
index 0000000000..043d07d2ba
--- /dev/null
+++ b/tests/tui_gateway/test_plugins_manage_install_ref.py
@@ -0,0 +1,24 @@
+"""Desktop/TUI ``plugins.manage`` honours a ``ref`` pin exactly like ``hermes plugins install --ref``."""
+from unittest.mock import patch
+
+from tui_gateway import methods_tools, server
+
+
+def test_plugins_manage_install_threads_ref_to_headless_install():
+    sha = "a" * 40
+    with patch("hermes_cli.plugins_cmd.dashboard_install_plugin", return_value={"ok": True}) as install:
+        server.handle_request({"id": "1", "method": "plugins.manage",
+                               "params": {"action": "install", "identifier": "org/private-plugin", "ref": sha}})
+    assert install.call_args.kwargs["ref"] == sha
+
+
+def test_plugins_manage_list_reports_ref_pin(monkeypatch, tmp_path):
+    sha = "b" * 40
+    pc = methods_tools._tools_mod("hermes_cli.plugins_cmd")
+    monkeypatch.setattr(pc, "_discover_all_plugins", lambda: [("team-plugin", "1.0", "", "git", tmp_path, "team-plugin")])
+    monkeypatch.setattr(pc, "_read_install_metadata", lambda: {"team-plugin": {"pinned": True, "revision": sha, "source": "x"}})
+    monkeypatch.setattr(pc, "_get_enabled_set", set)
+    monkeypatch.setattr(pc, "_get_disabled_set", set)
+    monkeypatch.setattr(methods_tools._tools_mod("hermes_cli.plugins_cmd_catalog"), "catalog_pins", dict)
+    (row,) = methods_tools._plugin_rows()
+    assert row["pinned_sha"] == sha
diff --git a/tui_gateway/methods_tools.py b/tui_gateway/methods_tools.py
index 0c8058950f..97e1cdaa9b 100644
--- a/tui_gateway/methods_tools.py
+++ b/tui_gateway/methods_tools.py
@@ -1331,6 +1331,7 @@ def _plugin_rows() -> list[dict]:
     cat = _tools_mod("hermes_cli.plugins_cmd_catalog")
     enabled, disabled = pc._get_enabled_set(), pc._get_disabled_set()
     pins = cat.catalog_pins()  # powers the desktop's "Update to <pin>" affordance
+    ref_pins = pc._read_install_metadata()  # ``--ref`` installs: pinned_sha so the desktop can show the pin
     out = []
     for name, version, desc, source, _dir, key in sorted(pc._discover_all_plugins()):
         status = pc._plugin_status(name, enabled, disabled, key=key)
@@ -1342,7 +1343,8 @@ def _plugin_rows() -> list[dict]:
         out.append({
             "name": name, "key": key, "version": str(version or ""), "description": desc or "",
             "source": source, "status": status, "portable": pc._is_portable_plugin_dir(_dir),
-            **cat.catalog_row_fields(_dir, pins)})
+            **cat.catalog_row_fields(_dir, pins),
+            **({"pinned_sha": sha} if (sha := pc.pinned_revision(name, ref_pins)) else {})})
     return out
 
 
@@ -1373,7 +1375,8 @@ def _plugins_install(rid, params):
     if not ident and not catalog_name:
         return _err(rid, 4019, "plugins.install requires 'identifier', 'repo', or 'catalog_name'")
     result = _tools_mod("hermes_cli.plugins_cmd").dashboard_install_plugin(
-        ident, force=bool(params.get("force")), enable=params.get("enable", True), catalog_name=catalog_name or None)
+        ident, force=bool(params.get("force")), enable=params.get("enable", True), catalog_name=catalog_name or None,
+        ref=str(params.get("ref") or "").strip() or None)
     return _ok(rid, result) if result.get("ok") else _err(rid, 5026, result.get("error") or "install failed")
 
 
diff --git a/website/docs/user-guide/desktop.md b/website/docs/user-guide/desktop.md
index df7e13d5b5..bd4cfa52f2 100644
--- a/website/docs/user-guide/desktop.md
+++ b/website/docs/user-guide/desktop.md
@@ -468,7 +468,10 @@ Hermes, in two sections on one page:
 Discovery sits underneath: the live [Plugin Catalog](./features/plugin-catalog.md)
 picker installs reviewed entries at their pinned commit into the selected
 profile, and **Install from Git** takes any other repository through the same
-review-then-install dialog. Old `Settings → Plugins` links redirect here.
+review-then-install dialog; its optional **Pin to commit** field installs one
+exact 40-character commit SHA (private repos included), and pinned plugins
+carry a `pinned @ <sha8>` badge in the list. Old `Settings → Plugins` links
+redirect here.
 
 ## Troubleshooting
 
diff --git a/website/docs/user-guide/features/plugins.md b/website/docs/user-guide/features/plugins.md
index 39e4f94a09..7e82894346 100644
--- a/website/docs/user-guide/features/plugins.md
+++ b/website/docs/user-guide/features/plugins.md
@@ -191,6 +191,13 @@ plugin; choose a new exact commit explicitly with
 profile-local install metadata contains no config values, environment values,
 secrets, or capability grants.
 
+The same pin is available in Hermes Desktop: **Skills → Plugins → Install from
+Git** has a *Pin to commit* field that takes the full 40-character SHA, and the
+plugins list shows a `pinned @ <sha8>` badge on every pinned install so a team
+can confirm everyone is running the same commit. `hermes plugins list` prints
+the pin in its Source column (`git pinned@<sha8>`). Pins work for private
+repositories too, through the same stored credentials described below.
+
 ### Installing from a private repository
 
 `hermes plugins install` clones non-interactively (it never prompts for a