diff --git a/.gitattributes b/.gitattributes
index 7bbe6d5..e860a85 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # RSR-compliant .gitattributes
 
 * text=auto eol=lf
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 228b1e3..8627148 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 version: 2
 updates:
   - package-ecosystem: "github-actions"
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index ee4baed..d94e65f 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 name: CodeQL Security Analysis
 
 on:
diff --git a/.github/workflows/governance.yml b/.github/workflows/governance.yml
index 4bb50e9..653ef98 100644
--- a/.github/workflows/governance.yml
+++ b/.github/workflows/governance.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # governance.yml — single wrapper calling the shared estate governance bundle
 # in hyperpolymath/standards instead of carrying per-repo copies.
 #
diff --git a/.github/workflows/hypatia-scan.yml b/.github/workflows/hypatia-scan.yml
index a895ce4..dfacf3b 100644
--- a/.github/workflows/hypatia-scan.yml
+++ b/.github/workflows/hypatia-scan.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Hypatia Neurosymbolic CI/CD Security Scan
 name: Hypatia Security Scan
 
diff --git a/.github/workflows/mirror.yml b/.github/workflows/mirror.yml
index 9553281..b99205f 100644
--- a/.github/workflows/mirror.yml
+++ b/.github/workflows/mirror.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # SPDX-FileCopyrightText: 2025 Jonathan D.A. Jewell
 name: Mirror to Git Forges
 
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 30172ca..4038403 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 name: OSSF Scorecard
 on:
   push:
diff --git a/.github/workflows/secret-scanner.yml b/.github/workflows/secret-scanner.yml
index 5495921..0641da5 100644
--- a/.github/workflows/secret-scanner.yml
+++ b/.github/workflows/secret-scanner.yml
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Prevention workflow - scans for hardcoded secrets before they reach main
 name: Secret Scanner
 
diff --git a/.machine_readable/AGENTIC.scm b/.machine_readable/AGENTIC.scm
index fe157f2..5e0bfae 100644
--- a/.machine_readable/AGENTIC.scm
+++ b/.machine_readable/AGENTIC.scm
@@ -1,4 +1,4 @@
-;; SPDX-License-Identifier: AGPL-3.0-or-later
+;; SPDX-License-Identifier: MPL-2.0
 ;; AGENTIC.scm - AI agent interaction patterns for claude-gecko-browser-extension
 
 (define agentic-config
diff --git a/.machine_readable/ECOSYSTEM.scm b/.machine_readable/ECOSYSTEM.scm
index 3670b78..c035e83 100644
--- a/.machine_readable/ECOSYSTEM.scm
+++ b/.machine_readable/ECOSYSTEM.scm
@@ -1,4 +1,4 @@
-;; SPDX-License-Identifier: AGPL-3.0-or-later
+;; SPDX-License-Identifier: MPL-2.0
 ;; ECOSYSTEM.scm - Ecosystem position for claude-gecko-browser-extension
 ;; Media-Type: application/vnd.ecosystem+scm
 
diff --git a/.machine_readable/META.scm b/.machine_readable/META.scm
index 85aa024..40025fe 100644
--- a/.machine_readable/META.scm
+++ b/.machine_readable/META.scm
@@ -1,4 +1,4 @@
-;; SPDX-License-Identifier: AGPL-3.0-or-later
+;; SPDX-License-Identifier: MPL-2.0
 ;; META.scm - Meta-level information for claude-gecko-browser-extension
 ;; Media-Type: application/meta+scheme
 
diff --git a/.machine_readable/NEUROSYM.scm b/.machine_readable/NEUROSYM.scm
index d37b428..3aab22a 100644
--- a/.machine_readable/NEUROSYM.scm
+++ b/.machine_readable/NEUROSYM.scm
@@ -1,4 +1,4 @@
-;; SPDX-License-Identifier: AGPL-3.0-or-later
+;; SPDX-License-Identifier: MPL-2.0
 ;; NEUROSYM.scm - Neurosymbolic integration config for claude-gecko-browser-extension
 
 (define neurosym-config
diff --git a/.machine_readable/PLAYBOOK.scm b/.machine_readable/PLAYBOOK.scm
index 8709d9c..77c36b7 100644
--- a/.machine_readable/PLAYBOOK.scm
+++ b/.machine_readable/PLAYBOOK.scm
@@ -1,4 +1,4 @@
-;; SPDX-License-Identifier: AGPL-3.0-or-later
+;; SPDX-License-Identifier: MPL-2.0
 ;; PLAYBOOK.scm - Operational runbook for claude-gecko-browser-extension
 
 (define playbook
diff --git a/.machine_readable/STATE.scm b/.machine_readable/STATE.scm
index 0c890a8..1736c93 100644
--- a/.machine_readable/STATE.scm
+++ b/.machine_readable/STATE.scm
@@ -1,4 +1,4 @@
-;; SPDX-License-Identifier: AGPL-3.0-or-later
+;; SPDX-License-Identifier: MPL-2.0
 ;; STATE.scm - Project state for claude-gecko-browser-extension
 ;; Media-Type: application/vnd.state+scm
 
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index efde91a..1f1548c 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -1,4 +1,4 @@
-<!-- SPDX-License-Identifier: AGPL-3.0-or-later -->
+<!-- SPDX-License-Identifier: MPL-2.0 -->
 # Contributor Covenant Code of Conduct
 
 ## Our Pledge
diff --git a/CONTRIBUTING.adoc b/CONTRIBUTING.adoc
index 5da21b5..1f34e60 100644
--- a/CONTRIBUTING.adoc
+++ b/CONTRIBUTING.adoc
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 = Contributing Guide
 
 == Getting Started
diff --git a/Justfile b/Justfile
index c24ef44..615c8f3 100644
--- a/Justfile
+++ b/Justfile
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Justfile - hyperpolymath standard task runner
 
 default:
diff --git a/LICENSE b/LICENSE
index d2dccf5..ec540b3 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-SPDX-License-Identifier: PMPL-1.0-or-later
+SPDX-License-Identifier: MPL-2.0
 SPDX-FileCopyrightText: 2024-2025 Palimpsest Stewardship Council
 
 ================================================================================
diff --git a/MAINTAINERS.adoc b/MAINTAINERS.adoc
index e07823a..a1c6544 100644
--- a/MAINTAINERS.adoc
+++ b/MAINTAINERS.adoc
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 = Maintainers
 :toc: preamble
 
diff --git a/Mustfile b/Mustfile
index 798718f..2516d22 100644
--- a/Mustfile
+++ b/Mustfile
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Mustfile - hyperpolymath mandatory checks
 # See: https://github.com/hyperpolymath/mustfile
 
diff --git a/ROADMAP.adoc b/ROADMAP.adoc
index aab8517..1b3c294 100644
--- a/ROADMAP.adoc
+++ b/ROADMAP.adoc
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 = Claude Gecko Browser Extension Roadmap
 
 == Current Status
diff --git a/contractiles/k9/README.adoc b/contractiles/k9/README.adoc
index 1992752..657168a 100644
--- a/contractiles/k9/README.adoc
+++ b/contractiles/k9/README.adoc
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: PMPL-1.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 = K9 Contractiles
 :toc: left
 :icons: font
diff --git a/contractiles/k9/examples/ci-config.k9.ncl b/contractiles/k9/examples/ci-config.k9.ncl
index c140589..4889743 100644
--- a/contractiles/k9/examples/ci-config.k9.ncl
+++ b/contractiles/k9/examples/ci-config.k9.ncl
@@ -1,5 +1,5 @@
 K9!
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Example Yard-level K9 component: CI/CD configuration with validation
 # Security Level: Yard (Nickel evaluation, contract validation)
 # Signature recommended but not required
diff --git a/contractiles/k9/examples/project-metadata.k9.ncl b/contractiles/k9/examples/project-metadata.k9.ncl
index 859870c..1c6ae4e 100644
--- a/contractiles/k9/examples/project-metadata.k9.ncl
+++ b/contractiles/k9/examples/project-metadata.k9.ncl
@@ -1,5 +1,5 @@
 K9!
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Example Kennel-level K9 component: Project metadata
 # Security Level: Kennel (pure data, no execution)
 # No signature required
diff --git a/contractiles/k9/examples/setup-repo.k9.ncl b/contractiles/k9/examples/setup-repo.k9.ncl
index c182db9..d23b033 100644
--- a/contractiles/k9/examples/setup-repo.k9.ncl
+++ b/contractiles/k9/examples/setup-repo.k9.ncl
@@ -1,5 +1,5 @@
 K9!
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Example Hunt-level K9 component: Repository setup automation
 # Security Level: Hunt (full execution with Just recipes)
 # ⚠️ SIGNATURE REQUIRED - DO NOT RUN WITHOUT VERIFICATION
diff --git a/contractiles/k9/template-hunt.k9.ncl b/contractiles/k9/template-hunt.k9.ncl
index db25742..39b4efb 100644
--- a/contractiles/k9/template-hunt.k9.ncl
+++ b/contractiles/k9/template-hunt.k9.ncl
@@ -1,5 +1,5 @@
 K9!
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # K9 Hunt-level template: Full execution with Just recipes
 # Security Level: Hunt (full system access)
 # ⚠️ SIGNATURE REQUIRED - Review carefully before use
diff --git a/contractiles/k9/template-kennel.k9.ncl b/contractiles/k9/template-kennel.k9.ncl
index 4303558..eff35e1 100644
--- a/contractiles/k9/template-kennel.k9.ncl
+++ b/contractiles/k9/template-kennel.k9.ncl
@@ -1,5 +1,5 @@
 K9!
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # K9 Kennel-level template: Pure data configuration
 # Security Level: Kennel (data-only, no execution)
 # No signature required - safe for any use
diff --git a/contractiles/k9/template-yard.k9.ncl b/contractiles/k9/template-yard.k9.ncl
index 4b49947..7115522 100644
--- a/contractiles/k9/template-yard.k9.ncl
+++ b/contractiles/k9/template-yard.k9.ncl
@@ -1,5 +1,5 @@
 K9!
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # K9 Yard-level template: Configuration with validation
 # Security Level: Yard (Nickel evaluation with contracts)
 # Signature recommended but not required
diff --git a/examples/SafeDOMExample.res b/examples/SafeDOMExample.res
index 407d5bf..e5c9046 100644
--- a/examples/SafeDOMExample.res
+++ b/examples/SafeDOMExample.res
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 // Example: Using SafeDOM for formally verified DOM mounting
 
 open SafeDOM
diff --git a/hooks/validate-codeql.sh b/hooks/validate-codeql.sh
index eabe229..15b52c3 100755
--- a/hooks/validate-codeql.sh
+++ b/hooks/validate-codeql.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Pre-commit hook: Validate CodeQL language matrix matches repo
 set -euo pipefail
 
diff --git a/hooks/validate-permissions.sh b/hooks/validate-permissions.sh
index f54d5c1..1999b01 100755
--- a/hooks/validate-permissions.sh
+++ b/hooks/validate-permissions.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Pre-commit hook: Validate workflow permissions declarations
 set -euo pipefail
 ERRORS=0
diff --git a/hooks/validate-sha-pins.sh b/hooks/validate-sha-pins.sh
index 5d9647c..697092b 100755
--- a/hooks/validate-sha-pins.sh
+++ b/hooks/validate-sha-pins.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Pre-commit hook: Validate GitHub Actions are SHA-pinned
 
 set -euo pipefail
diff --git a/hooks/validate-spdx.sh b/hooks/validate-spdx.sh
index 2e36879..cc81cf1 100755
--- a/hooks/validate-spdx.sh
+++ b/hooks/validate-spdx.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Pre-commit hook: Validate SPDX headers in workflow files
 
 set -euo pipefail
@@ -13,7 +13,7 @@ for workflow in .github/workflows/*.yml .github/workflows/*.yaml; do
     first_line=$(head -n1 "$workflow")
     if ! echo "$first_line" | grep -qE "$SPDX_PATTERN"; then
         echo "ERROR: Missing SPDX header in $workflow"
-        echo "  First line should be: # SPDX-License-Identifier: AGPL-3.0-or-later"
+        echo "  First line should be: # SPDX-License-Identifier: MPL-2.0"
         ERRORS=$((ERRORS + 1))
     fi
 done
diff --git a/src/background/background.js b/src/background/background.js
index 362a79e..80b960e 100644
--- a/src/background/background.js
+++ b/src/background/background.js
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 // Claude for Gecko - Background Service Worker
 
 const ANTHROPIC_API_URL = "https://api.anthropic.com/v1/messages";
diff --git a/src/content/content.css b/src/content/content.css
index a2cb836..02e467f 100644
--- a/src/content/content.css
+++ b/src/content/content.css
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: AGPL-3.0-or-later */
+/* SPDX-License-Identifier: MPL-2.0 */
 /* Claude for Gecko - Content Script Styles */
 
 #claude-gecko-overlay {
diff --git a/src/content/content.js b/src/content/content.js
index 35e0350..37e3d1c 100644
--- a/src/content/content.js
+++ b/src/content/content.js
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 // Claude for Gecko - Content Script
 
 /**
diff --git a/src/popup/options.css b/src/popup/options.css
index 8eff047..038617d 100644
--- a/src/popup/options.css
+++ b/src/popup/options.css
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: AGPL-3.0-or-later */
+/* SPDX-License-Identifier: MPL-2.0 */
 
 :root {
   --bg-primary: #1a1a1a;
diff --git a/src/popup/options.html b/src/popup/options.html
index eb97de3..1281d01 100644
--- a/src/popup/options.html
+++ b/src/popup/options.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<!-- SPDX-License-Identifier: AGPL-3.0-or-later -->
+<!-- SPDX-License-Identifier: MPL-2.0 -->
 <html lang="en">
 <head>
   <meta charset="UTF-8">
diff --git a/src/popup/options.js b/src/popup/options.js
index ff453e1..87e7959 100644
--- a/src/popup/options.js
+++ b/src/popup/options.js
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 // Claude for Gecko - Options Page Script
 
 const apiKeyInput = document.getElementById("api-key");
diff --git a/src/popup/popup.css b/src/popup/popup.css
index 2f32262..ef5bef6 100644
--- a/src/popup/popup.css
+++ b/src/popup/popup.css
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: AGPL-3.0-or-later */
+/* SPDX-License-Identifier: MPL-2.0 */
 
 :root {
   --bg-primary: #1a1a1a;
diff --git a/src/popup/popup.html b/src/popup/popup.html
index 083f41c..67c705b 100644
--- a/src/popup/popup.html
+++ b/src/popup/popup.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<!-- SPDX-License-Identifier: AGPL-3.0-or-later -->
+<!-- SPDX-License-Identifier: MPL-2.0 -->
 <html lang="en">
 <head>
   <meta charset="UTF-8">
diff --git a/src/popup/popup.js b/src/popup/popup.js
index 90b3bcd..8d5cbae 100644
--- a/src/popup/popup.js
+++ b/src/popup/popup.js
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-License-Identifier: MPL-2.0
 // Claude for Gecko - Popup Script
 
 const messagesContainer = document.getElementById("messages");