Feat v0.10.0 panel manifest lifecycle

Panels are a new kernel rendering tier between surfaces and block
renderers, enabling composable companion views (e.g. notes panel
inside chat). This version ships the plumbing layer:

- Manifest validation for panels field (provider map + consumer array)
- Soft-dep warning at install time for unresolved panel consumers
- PanelMeta struct + resolvePanels() resolves consumers at surface load
- window.__PANELS__ injected into base template
- sw.panels SDK module (open/close/toggle/isOpen/isAvailable/list/active)
- Lazy JS loading pipeline with module caching
- 10 new tests (6 validation + 4 resolve)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-0.9.9
+0.10.0

server/handlers/package_validate.go

@@ -38,6 +38,8 @@ type ManifestInfo struct {
 	RequiresRoles   []string // team roles needed to access this package (advisory, OR semantics)
 	Adoptable       bool     // if true, teams can adopt this package to get a team-scoped copy
 	HasFormTemplate bool     // if true, package declares a form_template at the top level
+	HasPanels       bool     // if true, package provides panels (provider form)
+	PanelConsumers  []string // panel IDs this package consumes (consumer form, e.g. "notes.reference")
 }
 
 // ValidateManifest parses a manifest map and validates all required fields,
@@ -199,6 +201,44 @@ func ValidateManifest(manifest map[string]any) (*ManifestInfo, error) {
 		info.HasFormTemplate = true
 	}
 
+	// v0.10.0: panels — provider (map) or consumer (array) declarations
+	if rawPanels := manifest["panels"]; rawPanels != nil {
+		switch p := rawPanels.(type) {
+		case map[string]any:
+			// Provider form: { "reference": { "entry": "...", "title": "..." }, ... }
+			for key, raw := range p {
+				panel, ok := raw.(map[string]any)
+				if !ok {
+					return nil, fmt.Errorf("panels.%s must be an object", key)
+				}
+				entry, _ := panel["entry"].(string)
+				if entry == "" {
+					return nil, fmt.Errorf("panels.%s requires an 'entry' field", key)
+				}
+				title, _ := panel["title"].(string)
+				if title == "" {
+					return nil, fmt.Errorf("panels.%s requires a 'title' field", key)
+				}
+			}
+			info.HasPanels = true
+		case []any:
+			// Consumer form: ["notes.reference", "notes.graph"]
+			for i, raw := range p {
+				s, ok := raw.(string)
+				if !ok || s == "" {
+					return nil, fmt.Errorf("panels[%d] must be a non-empty string", i)
+				}
+				parts := strings.SplitN(s, ".", 2)
+				if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
+					return nil, fmt.Errorf("panels[%d] must be in 'package.panel' format, got %q", i, s)
+				}
+				info.PanelConsumers = append(info.PanelConsumers, s)
+			}
+		default:
+			return nil, fmt.Errorf("panels must be an object (provider) or array (consumer)")
+		}
+	}
+
 	info.SchemaVersion = ParseSchemaVersion(manifest)
 
 	// ── Type-specific constraints ────────────────────────────────

server/handlers/package_validate_test.go

@@ -349,3 +349,100 @@ func TestValidateManifest_AutoSynthesizeSurfaces(t *testing.T) {
 		t.Errorf("expected layout 'editor', got %q", s["layout"])
 	}
 }
+
+// ── Panels validation (v0.10.0) ─────────────────────────────
+
+func TestValidateManifest_PanelsProviderValid(t *testing.T) {
+	m := map[string]any{
+		"id":    "my-notes",
+		"title": "Notes",
+		"panels": map[string]any{
+			"reference": map[string]any{
+				"entry": "js/panels/reference.js",
+				"title": "Notes Reference",
+				"icon":  "📝",
+			},
+		},
+	}
+	info, err := ValidateManifest(m)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !info.HasPanels {
+		t.Error("expected HasPanels to be true")
+	}
+}
+
+func TestValidateManifest_PanelsProviderMissingEntry(t *testing.T) {
+	m := map[string]any{
+		"id":    "my-notes",
+		"title": "Notes",
+		"panels": map[string]any{
+			"reference": map[string]any{
+				"title": "Notes Reference",
+			},
+		},
+	}
+	_, err := ValidateManifest(m)
+	if err == nil {
+		t.Fatal("expected error for panel missing entry")
+	}
+}
+
+func TestValidateManifest_PanelsProviderMissingTitle(t *testing.T) {
+	m := map[string]any{
+		"id":    "my-notes",
+		"title": "Notes",
+		"panels": map[string]any{
+			"reference": map[string]any{
+				"entry": "js/panels/reference.js",
+			},
+		},
+	}
+	_, err := ValidateManifest(m)
+	if err == nil {
+		t.Fatal("expected error for panel missing title")
+	}
+}
+
+func TestValidateManifest_PanelsConsumerValid(t *testing.T) {
+	m := map[string]any{
+		"id":    "my-chat",
+		"title": "Chat",
+		"panels": []any{"notes.reference", "notes.graph"},
+	}
+	info, err := ValidateManifest(m)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if len(info.PanelConsumers) != 2 {
+		t.Fatalf("expected 2 panel consumers, got %d", len(info.PanelConsumers))
+	}
+	if info.PanelConsumers[0] != "notes.reference" {
+		t.Errorf("expected 'notes.reference', got %q", info.PanelConsumers[0])
+	}
+}
+
+func TestValidateManifest_PanelsConsumerInvalidFormat(t *testing.T) {
+	m := map[string]any{
+		"id":    "my-chat",
+		"title": "Chat",
+		"panels": []any{"notes-no-dot"},
+	}
+	_, err := ValidateManifest(m)
+	if err == nil {
+		t.Fatal("expected error for consumer panel without dot separator")
+	}
+}
+
+func TestValidateManifest_PanelsInvalidType(t *testing.T) {
+	m := map[string]any{
+		"id":     "my-pkg",
+		"title":  "My Package",
+		"panels": "invalid-string",
+	}
+	_, err := ValidateManifest(m)
+	if err == nil {
+		t.Fatal("expected error for panels as string (neither map nor array)")
+	}
+}

server/handlers/packages.go

@@ -349,6 +349,22 @@ func (h *PackageHandler) InstallPackage(c *gin.Context) {
 		}
 	}
 
+	// Phase 11: Soft-dep warnings for panel consumers
+	if len(mInfo.PanelConsumers) > 0 {
+		for _, ref := range mInfo.PanelConsumers {
+			parts := strings.SplitN(ref, ".", 2)
+			if len(parts) != 2 {
+				continue
+			}
+			provPkg, _ := h.stores.Packages.Get(c.Request.Context(), parts[0])
+			if provPkg == nil {
+				log.Printf("[packages] %s: panel consumer %q — provider package %q not installed", pkgID, ref, parts[0])
+			} else if !provPkg.Enabled {
+				log.Printf("[packages] %s: panel consumer %q — provider package %q is disabled", pkgID, ref, parts[0])
+			}
+		}
+	}
+
 	resp := gin.H{
 		"id":      pkgID,
 		"title":   mInfo.Title,

server/pages/pages.go

@@ -61,6 +61,20 @@ type SurfaceManifest struct {
 	Source       string   `json:"source"`        // "core" or "extension"
 }
 
+// PanelMeta describes a resolved panel available to a surface.
+type PanelMeta struct {
+	PanelID       string `json:"panel_id"`                 // e.g. "notes.reference"
+	PackageID     string `json:"package_id"`               // e.g. "notes"
+	Entry         string `json:"entry"`                    // e.g. "js/panels/reference.js"
+	Title         string `json:"title"`                    // human-readable
+	Icon          string `json:"icon,omitempty"`           // emoji or icon key
+	Description   string `json:"description,omitempty"`    // short description
+	MinWidth      int    `json:"min_width,omitempty"`      // minimum width in px
+	MinHeight     int    `json:"min_height,omitempty"`     // minimum height in px
+	DefaultWidth  int    `json:"default_width,omitempty"`  // default width in px
+	DefaultHeight int    `json:"default_height,omitempty"` // default height in px
+}
+
 // BannerConfig holds environment banner settings.
 type BannerConfig struct {
 	Text       string `json:"text"`
@@ -109,6 +123,8 @@ type PageData struct {
 
 	BrowserExtensions []string `json:"-"` // IDs of enabled browser-tier extensions (for script injection)
 
+	Panels []PanelMeta `json:"-"` // resolved panels available to this surface
+
 	InstanceName     string // branding: instance display name
 	LogoURL          string // branding: custom logo URL
 	Tagline          string // branding: tagline under instance name
@@ -237,6 +253,72 @@ func (e *Engine) browserExtensionIDs() []string {
 	return ids
 }
 
+// resolvePanels reads the consumer's panels array from the raw manifest and
+// resolves each reference against installed+enabled provider packages.
+// Returns nil if no panels are declared or no providers are available.
+func (e *Engine) resolvePanels(ctx context.Context, manifest map[string]any) []PanelMeta {
+	if e.stores.Packages == nil {
+		return nil
+	}
+	rawPanels, ok := manifest["panels"].([]any)
+	if !ok || len(rawPanels) == 0 {
+		return nil
+	}
+
+	var result []PanelMeta
+	for _, raw := range rawPanels {
+		ref, ok := raw.(string)
+		if !ok {
+			continue
+		}
+		parts := strings.SplitN(ref, ".", 2)
+		if len(parts) != 2 {
+			continue
+		}
+		pkgID, panelKey := parts[0], parts[1]
+
+		provPkg, err := e.stores.Packages.Get(ctx, pkgID)
+		if err != nil || provPkg == nil || !provPkg.Enabled {
+			continue
+		}
+
+		provPanels, ok := provPkg.Manifest["panels"].(map[string]any)
+		if !ok {
+			continue
+		}
+		panelDef, ok := provPanels[panelKey].(map[string]any)
+		if !ok {
+			continue
+		}
+
+		meta := PanelMeta{
+			PanelID:   ref,
+			PackageID: pkgID,
+		}
+		meta.Entry, _ = panelDef["entry"].(string)
+		meta.Title, _ = panelDef["title"].(string)
+		meta.Icon, _ = panelDef["icon"].(string)
+		meta.Description, _ = panelDef["description"].(string)
+		if v, ok := panelDef["min_width"].(float64); ok {
+			meta.MinWidth = int(v)
+		}
+		if v, ok := panelDef["min_height"].(float64); ok {
+			meta.MinHeight = int(v)
+		}
+		if v, ok := panelDef["default_width"].(float64); ok {
+			meta.DefaultWidth = int(v)
+		}
+		if v, ok := panelDef["default_height"].(float64); ok {
+			meta.DefaultHeight = int(v)
+		}
+
+		if meta.Entry != "" && meta.Title != "" {
+			result = append(result, meta)
+		}
+	}
+	return result
+}
+
 // UserContext is the authenticated user's info available to templates.
 type UserContext struct {
 	ID          string `json:"id"`
@@ -552,6 +634,7 @@ func (e *Engine) RenderExtensionSurface() gin.HandlerFunc {
 			EnabledSurfaces:   e.EnabledSurfaceIDs(),
 			ExtensionSurfaces: e.extensionNavItems(),
 			BrowserExtensions: e.browserExtensionIDs(),
+			Panels:            e.resolvePanels(c.Request.Context(), sr.Manifest),
 		})
 	}
 }

server/pages/panels_test.go

@@ -0,0 +1,141 @@
+package pages
+
+import (
+	"context"
+	"testing"
+
+	"armature/store"
+)
+
+func TestResolvePanels_HappyPath(t *testing.T) {
+	// Provider package with a panels map
+	provider := &store.PackageRegistration{
+		ID:      "notes",
+		Title:   "Notes",
+		Enabled: true,
+		Source:  "extension",
+		Manifest: map[string]any{
+			"panels": map[string]any{
+				"reference": map[string]any{
+					"entry":         "js/panels/reference.js",
+					"title":         "Notes Reference",
+					"icon":          "📝",
+					"description":   "Searchable note list",
+					"min_width":     float64(280),
+					"default_width": float64(400),
+				},
+			},
+		},
+	}
+
+	// Consumer package that wants notes.reference
+	consumer := &store.PackageRegistration{
+		ID:      "chat",
+		Title:   "Chat",
+		Enabled: true,
+		Source:  "extension",
+		Manifest: map[string]any{
+			"panels": []any{"notes.reference"},
+		},
+	}
+
+	e := testEngine(t, provider, consumer)
+	panels := e.resolvePanels(context.Background(), consumer.Manifest)
+
+	if len(panels) != 1 {
+		t.Fatalf("expected 1 panel, got %d", len(panels))
+	}
+	p := panels[0]
+	if p.PanelID != "notes.reference" {
+		t.Errorf("expected panel_id 'notes.reference', got %q", p.PanelID)
+	}
+	if p.PackageID != "notes" {
+		t.Errorf("expected package_id 'notes', got %q", p.PackageID)
+	}
+	if p.Entry != "js/panels/reference.js" {
+		t.Errorf("expected entry 'js/panels/reference.js', got %q", p.Entry)
+	}
+	if p.Title != "Notes Reference" {
+		t.Errorf("expected title 'Notes Reference', got %q", p.Title)
+	}
+	if p.Icon != "📝" {
+		t.Errorf("expected icon '📝', got %q", p.Icon)
+	}
+	if p.MinWidth != 280 {
+		t.Errorf("expected min_width 280, got %d", p.MinWidth)
+	}
+	if p.DefaultWidth != 400 {
+		t.Errorf("expected default_width 400, got %d", p.DefaultWidth)
+	}
+}
+
+func TestResolvePanels_ProviderMissing(t *testing.T) {
+	// Consumer references a package that doesn't exist
+	consumer := &store.PackageRegistration{
+		ID:      "chat",
+		Title:   "Chat",
+		Enabled: true,
+		Source:  "extension",
+		Manifest: map[string]any{
+			"panels": []any{"nonexistent.panel"},
+		},
+	}
+
+	e := testEngine(t, consumer)
+	panels := e.resolvePanels(context.Background(), consumer.Manifest)
+
+	if len(panels) != 0 {
+		t.Errorf("expected 0 panels for missing provider, got %d", len(panels))
+	}
+}
+
+func TestResolvePanels_ProviderDisabled(t *testing.T) {
+	provider := &store.PackageRegistration{
+		ID:      "notes",
+		Title:   "Notes",
+		Enabled: false, // disabled
+		Source:  "extension",
+		Manifest: map[string]any{
+			"panels": map[string]any{
+				"reference": map[string]any{
+					"entry": "js/panels/reference.js",
+					"title": "Notes Reference",
+				},
+			},
+		},
+	}
+
+	consumer := &store.PackageRegistration{
+		ID:      "chat",
+		Title:   "Chat",
+		Enabled: true,
+		Source:  "extension",
+		Manifest: map[string]any{
+			"panels": []any{"notes.reference"},
+		},
+	}
+
+	e := testEngine(t, provider, consumer)
+	panels := e.resolvePanels(context.Background(), consumer.Manifest)
+
+	if len(panels) != 0 {
+		t.Errorf("expected 0 panels for disabled provider, got %d", len(panels))
+	}
+}
+
+func TestResolvePanels_NoPanelsField(t *testing.T) {
+	consumer := &store.PackageRegistration{
+		ID:      "chat",
+		Title:   "Chat",
+		Enabled: true,
+		Source:  "extension",
+		Manifest: map[string]any{},
+	}
+
+	e := testEngine(t, consumer)
+	panels := e.resolvePanels(context.Background(), consumer.Manifest)
+
+	if panels != nil {
+		t.Errorf("expected nil panels for manifest without panels field, got %v", panels)
+	}
+}

server/pages/templates/base.html

@@ -124,6 +124,7 @@
         {{if .Manifest}}window.__MANIFEST__ = {{.Manifest | toJSON}};{{end}}
         {{if .SurfacePath}}window.__SURFACE_PATH__ = '{{.SurfacePath}}';{{end}}
         {{if .SurfaceParams}}window.__SURFACE_PARAMS__ = {{.SurfaceParams | toJSON}};{{end}}
+        {{if .Panels}}window.__PANELS__ = {{.Panels | toJSON}};{{end}}
     </script>
 
     {{/* All surfaces use Preact SDK boot(). Legacy script includes removed.

src/js/sw/sdk/index.js

@@ -27,6 +27,7 @@ import { createMarkdown }   from './markdown.js';
 import { createUsers }      from './users.js';
 import { createTesting }    from './testing.js';
 import { createForms }      from './forms.js';
+import { createPanels }     from './panels.js';
 import { confirm }          from '../primitives/confirm.js';
 import { prompt }           from '../primitives/prompt.js';
 
@@ -129,6 +130,9 @@ export async function boot() {
     // Forms — typed form rendering + validation (v0.9.5)
     sw.forms = createForms(restClient);
 
+    // Panels — composable companion views (v0.10.0)
+    sw.panels = createPanels(events.emit.bind(events));
+
     // Shell helpers — imperative confirm/prompt backed by primitives
     sw.confirm = confirm;
     sw.prompt  = prompt;
@@ -239,11 +243,18 @@ export async function boot() {
     }
 
     // Marker for idempotency
-    sw._sdk = '0.9.5';
+    sw._sdk = '0.10.0';
 
     // 8. Expose globally
     window.sw = sw;
 
+    // 8b. Register panels from server-resolved metadata
+    if (window.__PANELS__) {
+        for (const meta of window.__PANELS__) {
+            sw.panels._register(meta.panel_id, meta);
+        }
+    }
+
     // 9. Boot sequence
     theme.init();
 

src/js/sw/sdk/panels.js

@@ -0,0 +1,170 @@
+// ==========================================
+// Armature — SDK: Panel System (v0.10.0)
+// ==========================================
+// Composable companion views that surfaces can
+// pull in from other packages.
+//
+// Factory: createPanels(emitFn)
+// ==========================================
+
+/**
+ * Create the panels registry and lifecycle manager.
+ *
+ * @param {Function} emitFn — events.emit for change notifications
+ * @returns {object} panels
+ */
+export function createPanels(emitFn) {
+    /** @type {Map<string, object>} panelId → manifest meta */
+    const _registry = new Map();
+    /** @type {Map<string, {el: HTMLElement, cleanup: Function}>} panelId → active state */
+    const _active = new Map();
+    /** @type {Map<string, object>} panelId → cached JS module */
+    const _modules = new Map();
+
+    return {
+        /**
+         * Register a panel from resolved manifest data. Called by the
+         * kernel during surface boot — not by package code directly.
+         *
+         * @param {string} panelId — e.g. 'notes.reference'
+         * @param {object} meta — PanelMeta from window.__PANELS__
+         */
+        _register(panelId, meta) {
+            _registry.set(panelId, meta);
+        },
+
+        /**
+         * Open a panel. Lazy-loads the JS entry if not yet loaded,
+         * creates an unstyled container, and calls mount().
+         *
+         * @param {string} panelId — e.g. 'notes.reference'
+         * @param {object} [opts]
+         * @param {string} [opts.mode] — presentation hint (ignored in v0.10.0)
+         * @param {object} [opts.params] — passed to mount(el, ctx) as ctx.params
+         * @returns {Promise<boolean>} — false if panel not available
+         */
+        async open(panelId, opts = {}) {
+            if (!_registry.has(panelId)) return false;
+            if (_active.has(panelId)) return true; // already open
+
+            const meta = _registry.get(panelId);
+
+            // Lazy-load the panel JS module
+            if (!_modules.has(panelId)) {
+                try {
+                    const base = window.__BASE__ || '';
+                    const url = `${base}/surfaces/${meta.package_id}/${meta.entry}`;
+                    const mod = await import(url);
+                    _modules.set(panelId, mod);
+                } catch (err) {
+                    console.error(`[sw.panels] Failed to load ${panelId}:`, err);
+                    return false;
+                }
+            }
+
+            const mod = _modules.get(panelId);
+            if (typeof mod.mount !== 'function') {
+                console.error(`[sw.panels] ${panelId} does not export mount()`);
+                return false;
+            }
+
+            // Create unstyled container (v0.10.0 — no chrome)
+            const el = document.createElement('div');
+            el.className = 'sw-panel-container';
+            el.dataset.panelId = panelId;
+            el.style.cssText = 'position:fixed;top:80px;right:16px;width:400px;height:350px;background:var(--bg-surface,#fff);border:1px solid var(--border,#ccc);border-radius:8px;overflow:auto;z-index:100;';
+            document.body.appendChild(el);
+
+            // Mount
+            const ctx = {
+                sw: window.sw,
+                params: opts.params || {},
+                panelId,
+                close: () => this.close(panelId),
+                resize: () => {}, // no-op in v0.10.0
+            };
+
+            let cleanup;
+            try {
+                cleanup = mod.mount(el, ctx);
+            } catch (err) {
+                console.error(`[sw.panels] mount() failed for ${panelId}:`, err);
+                el.remove();
+                return false;
+            }
+
+            _active.set(panelId, { el, cleanup: typeof cleanup === 'function' ? cleanup : () => {} });
+            emitFn('panels.opened', { panelId, mode: opts.mode || 'plain' }, { localOnly: true });
+            return true;
+        },
+
+        /**
+         * Close a panel. Calls cleanup, removes container from DOM.
+         *
+         * @param {string} panelId
+         */
+        close(panelId) {
+            const entry = _active.get(panelId);
+            if (!entry) return;
+
+            try {
+                entry.cleanup();
+            } catch (err) {
+                console.warn(`[sw.panels] cleanup error for ${panelId}:`, err);
+            }
+
+            entry.el.remove();
+            _active.delete(panelId);
+            emitFn('panels.closed', { panelId }, { localOnly: true });
+        },
+
+        /**
+         * Toggle a panel open/closed.
+         *
+         * @param {string} panelId
+         * @param {object} [opts] — passed to open() if opening
+         * @returns {Promise<boolean>}
+         */
+        async toggle(panelId, opts = {}) {
+            if (_active.has(panelId)) {
+                this.close(panelId);
+                return true;
+            }
+            return this.open(panelId, opts);
+        },
+
+        /**
+         * Check if a panel is currently open.
+         * @param {string} panelId
+         * @returns {boolean}
+         */
+        isOpen(panelId) {
+            return _active.has(panelId);
+        },
+
+        /**
+         * Check if a panel is available (provider installed + enabled).
+         * @param {string} panelId
+         * @returns {boolean}
+         */
+        isAvailable(panelId) {
+            return _registry.has(panelId);
+        },
+
+        /**
+         * List available panel IDs for the current surface.
+         * @returns {string[]}
+         */
+        list() {
+            return [..._registry.keys()];
+        },
+
+        /**
+         * List currently open panel IDs.
+         * @returns {string[]}
+         */
+        active() {
+            return [..._active.keys()];
+        },
+    };
+}