diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47c094c..8f0f1a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.5.1 — from-plan pass-through for external spec formats
+
+### Fixed
+
+- **`/cursor:from-plan` no longer discards plans it cannot parse** (#16). A plan/spec whose headings don't match the Claude plan-mode shape (e.g. files produced by other spec/plan tooling) was reduced to a four-placeholder skeleton — the entire plan body was silently dropped and Cursor received an empty task. Such documents are now embedded **verbatim** in the task file (with the guardrail block still appended), matching the pass-through behaviour the module docs always promised. `SECTION_HINTS` additionally learned common spec-driven headings (`overview`, `problem statement`, `requirements`, `design`, `spec`, `tasks`, `steps`, `testing`, `validation`, `success criteria`), so those map onto the proper task sections instead of falling back. README now documents that `from-plan` accepts any path, not just `~/.claude/plans/`.
+
 ## 0.5.0 — session lifecycle hooks, stop review gate, process-group cancel
 
 Second port wave from upstream [`openai/codex-plugin-cc`](https://github.com/openai/codex-plugin-cc) (session tracking, the stop-time review gate, prompt templates, structured review output), adapted to the Cursor CLI and the zero-deps runtime — plus a real cancellation bug found while comparing the two codebases. (#17, #18, #20, #21)
diff --git a/README.md b/README.md
index f4c9cc0..f5b49ac 100644
--- a/README.md
+++ b/README.md
@@ -198,6 +198,15 @@ Examples:
 /cursor:from-plan --list                # show the 15 most recent plans
 ```
 
+**Not limited to Claude's plan mode.** The `[plan-name]` argument also accepts an absolute or repo-relative **path to any Markdown plan/spec file** — one written by another spec/plan plugin (Superpowers, GSD, …) or by hand:
+
+```
+/cursor:from-plan ./specs/checkout-flow/plan.md
+/cursor:from-plan --delegate docs/rfc-042.md
+```
+
+Sections named like `Overview`, `Requirements`, `Design`, `Tasks`, or `Testing` are mapped onto the task shape; a document whose structure isn't recognised at all is embedded **verbatim** (with the guardrail block appended) instead of being reduced to placeholders. And if you don't need the task-file conversion, `/cursor:delegate "Implement @specs/checkout-flow/plan.md"` sends the file to Cursor directly.
+
 This is the closest thing to "plan in Claude, execute in Cursor" in one session: Claude does the thinking, Cursor does the typing, and the task file is a durable contract between the two.
 
 ### `/cursor:review [flags] [focus...]`
diff --git a/plugins/cursor/package-lock.json b/plugins/cursor/package-lock.json
index 6917a1e..a4b2c83 100644
--- a/plugins/cursor/package-lock.json
+++ b/plugins/cursor/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cursor-plugin-cc",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cursor-plugin-cc",
-      "version": "0.5.0",
+      "version": "0.5.1",
       "license": "MIT",
       "devDependencies": {
         "@eslint/js": "^9.16.0",
diff --git a/plugins/cursor/package.json b/plugins/cursor/package.json
index 0827f41..623afdd 100644
--- a/plugins/cursor/package.json
+++ b/plugins/cursor/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cursor-plugin-cc",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Use Cursor CLI from Claude Code to delegate coding tasks to Composer and other Cursor models.",
   "type": "module",
   "license": "MIT",
diff --git a/plugins/cursor/plugin.json b/plugins/cursor/plugin.json
index b9f0999..4b3caf4 100644
--- a/plugins/cursor/plugin.json
+++ b/plugins/cursor/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "cursor",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Hand off tasks from Claude Code to cursor-agent. Composer-optimised.",
   "author": {
     "name": "Tomas Grasl",
diff --git a/plugins/cursor/scripts/lib/plan.mjs b/plugins/cursor/scripts/lib/plan.mjs
index da692ae..561d789 100644
--- a/plugins/cursor/scripts/lib/plan.mjs
+++ b/plugins/cursor/scripts/lib/plan.mjs
@@ -176,9 +176,32 @@ export function slugify(s) {
   return cleaned.slice(0, 50) || 'plan';
 }
 
+// Hints are ordered most- to least-specific per intent. The tail of each list
+// covers common spec-driven formats from other plan/spec tooling (Superpowers,
+// GSD, hand-written specs), not just Claude Code's plan-mode shape. (#16)
 const SECTION_HINTS = {
-  context: ['context', 'background', 'why', 'motivation'],
-  approach: ['approach', 'plan', 'implementation', 'solution', 'design'],
+  context: [
+    'context',
+    'background',
+    'why',
+    'motivation',
+    'problem statement',
+    'problem',
+    'overview',
+    'summary',
+  ],
+  approach: [
+    'approach',
+    'plan',
+    'implementation',
+    'solution',
+    'design',
+    'requirements',
+    'specification',
+    'spec',
+    'tasks',
+    'steps',
+  ],
   files: [
     'file-by-file change list',
     'files to touch',
@@ -188,7 +211,16 @@ const SECTION_HINTS = {
     'critical files to modify',
     'files',
   ],
-  verification: ['verification', 'how to verify', 'test plan', 'tests', 'acceptance criteria'],
+  verification: [
+    'verification',
+    'how to verify',
+    'test plan',
+    'tests',
+    'acceptance criteria',
+    'testing',
+    'validation',
+    'success criteria',
+  ],
 };
 
 /**
@@ -231,6 +263,36 @@ export function buildTaskContent(plan) {
   lines.push('');
   lines.push(`> Generated from Claude Code plan: \`${plan.path}\``);
   lines.push('');
+
+  // Pass-through fallback: a plan/spec in a shape we don't recognise (another
+  // spec plugin's format, a hand-written doc) must never be reduced to four
+  // placeholder sections — that silently discards the entire plan body.
+  // Embed the document verbatim instead and let Cursor follow it as written.
+  if (!context && !approach && !files && !verification) {
+    const rawBody = String(plan.raw ?? '')
+      .replace(/^\s*#\s[^\n]*\n/, '') // drop the leading H1 — already emitted above
+      .trim();
+    lines.push('## Task specification');
+    lines.push('');
+    lines.push(
+      '_The source plan uses its own structure (not the Claude plan-mode shape); it is included verbatim below — follow it as written._',
+    );
+    lines.push('');
+    lines.push(rawBody || '(the source plan file is empty)');
+    lines.push('');
+    lines.push('## How to verify');
+    lines.push('');
+    lines.push(
+      'Follow any verification steps in the specification above; otherwise:\n\n' +
+        "- Run the project's test suite (`npm test`, `pnpm test`, `task test`, etc.).\n" +
+        '- Run the type-check / lint if the project has one.\n' +
+        '- Manual spot-check of the changed behaviour.',
+    );
+    lines.push('');
+    pushConstraints(lines);
+    return lines.join('\n');
+  }
+
   lines.push('## Goal');
   lines.push('');
   lines.push(plan.title ? plan.title : '(see Context below)');
@@ -258,6 +320,14 @@ export function buildTaskContent(plan) {
         '- Manual spot-check of the changed behaviour.',
   );
   lines.push('');
+  pushConstraints(lines);
+  return lines.join('\n');
+}
+
+/**
+ * @param {string[]} lines
+ */
+function pushConstraints(lines) {
   lines.push('## Constraints');
   lines.push('');
   lines.push(
@@ -269,5 +339,4 @@ export function buildTaskContent(plan) {
     '- Do not modify lockfiles (`package-lock.json`, `pnpm-lock.yaml`, `yarn.lock`) unless dependencies are part of the task.',
   );
   lines.push('');
-  return lines.join('\n');
 }
diff --git a/plugins/cursor/tests/plan.test.mjs b/plugins/cursor/tests/plan.test.mjs
index de79be6..407fcc1 100644
--- a/plugins/cursor/tests/plan.test.mjs
+++ b/plugins/cursor/tests/plan.test.mjs
@@ -103,6 +103,72 @@ describe('buildTaskContent', () => {
     expect(out).toContain('just this.');
     expect(out).toContain('(no Approach');
   });
+
+  it('passes an unrecognised plan shape through verbatim instead of placeholders', () => {
+    const raw = [
+      '# Externí spec',
+      '',
+      '## Etapa 1',
+      '',
+      'Přidat endpoint /health.',
+      '',
+      '## Poznámky',
+      '',
+      'Držet se stylu okolního kódu.',
+      '',
+    ].join('\n');
+    const plan = {
+      path: '/tmp/external-spec.md',
+      title: 'Externí spec',
+      slug: 'externi-spec',
+      sections: splitSections(raw).sections,
+      raw,
+    };
+    const out = buildTaskContent(plan);
+    // The whole body survives…
+    expect(out).toContain('Přidat endpoint /health.');
+    expect(out).toContain('Držet se stylu okolního kódu.');
+    expect(out).toContain('follow it as written');
+    // …and no placeholder skeleton is emitted.
+    expect(out).not.toContain('(no Context section');
+    expect(out).not.toContain('(no Approach');
+    // Guardrails still apply.
+    expect(out).toContain('## Constraints');
+    // The leading H1 is not duplicated.
+    expect(out.match(/# Externí spec/g)).toHaveLength(1);
+  });
+
+  it('maps common spec-driven headings onto the task sections', () => {
+    const raw = [
+      '# Spec-shaped plan',
+      '',
+      '## Overview',
+      '',
+      'Why we do this.',
+      '',
+      '## Requirements',
+      '',
+      '- must do X',
+      '',
+      '## Testing',
+      '',
+      '- run `npm test`',
+      '',
+    ].join('\n');
+    const plan = {
+      path: '/tmp/spec.md',
+      title: 'Spec-shaped plan',
+      slug: 'spec-shaped-plan',
+      sections: splitSections(raw).sections,
+      raw,
+    };
+    const out = buildTaskContent(plan);
+    expect(out).toContain('Why we do this.');
+    expect(out).toContain('- must do X');
+    expect(out).toContain('- run `npm test`');
+    expect(out).not.toContain('(no Context section');
+    expect(out).not.toContain('(no Approach');
+  });
 });
 
 describe('resolvePlanPath + parsePlanFile against a temp plans dir', () => {