docs: bug-report template asks for doctor output; README troubleshooting entry; doctor test in the Windows lane

The template gives the Claude Code doctor path and a lookup for other
hosts and names no bare gstack- command (asserted in
test/gstack-doctor.test.ts). The doctor test runs every script through
explicit bash argv, so it joins the curated Windows free subset.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,40 @@
+---
+name: Bug report
+about: A gstack skill, helper or setup step broke or did something unexpected
+labels: bug
+---
+
+## What happened
+
+<!-- The skill or command you ran, what it printed, and what you expected instead. -->
+
+## Steps to reproduce
+
+1.
+2.
+
+## Readiness report
+
+Paste the complete output of gstack's doctor. It starts no skill, makes no paid
+call and prints no secrets or file contents. Run the line for your install:
+
+```bash
+# Claude Code
+~/.claude/skills/gstack/bin/gstack-doctor
+
+# Any other host: from your gstack checkout, ./setup --status ends with the
+# absolute path of the doctor ("Readiness check: ..."). Run that path.
+./setup --status
+
+# The state root (where installs.tsv lists every install) for the same checkout:
+./bin/gstack-paths --get GSTACK_STATE_ROOT
+```
+
+```text
+(doctor output here)
+```
+
+## Environment
+
+- Host (Claude Code, Codex, Cursor, ...) and its version:
+- OS:

README.md

@@ -650,6 +650,16 @@ Data is stored in [Supabase](https://supabase.com) (open source Firebase alterna
 
 ## Troubleshooting
 
+**Not sure what's wrong?** Run the doctor: `~/.claude/skills/gstack/bin/gstack-doctor`
+(on other hosts, `./setup --status` in your gstack checkout ends with the
+doctor's absolute path). Without starting a skill or spending anything, it
+prints one row per check (install, state root, Bun, hooks, Codex and its cached
+model probe, artifacts sync, the browse bundle, Claude Code, your largest
+session journal and recent /autoplan guard codes), each `ok`, `warn`,
+`not configured` or `fail` with the command that fixes it. It exits non-zero
+only on `fail`. `--live` also runs the paid Codex model check (one short call).
+Paste its output into bug reports.
+
 **A message says `not run`, `unavailable` or names a fix?** Look it up in
 [docs/troubleshooting.md](docs/troubleshooting.md): every gate message gstack
 prints, what it means, what was kept, and the command that fixes it.

scripts/lib/windows-curation.ts

@@ -240,6 +240,7 @@ export const KNOWN_WINDOWS_SAFE: Array<{ file: string; reason: string }> = [
   { file: 'test/generator-eexist.test.ts',
     reason: 'E4: runs the generators through Bun argv with the Windows EEXIST emulation preload; no shebang execution' },
   { file: 'test/gstack-config-gbrain-refresh.test.ts', reason: 'E6: runs bin/gstack-config through explicit bash; its gbrain/python3 shims are found by bash PATH lookup, never launched by CreateProcess' },
+  { file: 'test/gstack-doctor.test.ts', reason: 'runs bin/gstack-doctor and setup --status through explicit bash argv in an os.tmpdir fixture; its bun/codex/claude/probe stubs are found by bash PATH lookup, and expected paths use bash spellings' },
   {
     file: 'test/qa-evidence.test.ts',
     reason: 'invokes the production helper through Bun argv and exercises native Windows job cleanup, private file captures and backpressured receipt output',

test/gstack-doctor.test.ts

@@ -337,3 +337,23 @@ describe('./setup --status Codex row', () => {
     expect(fs.readdirSync(f.state).sort()).toEqual(before);
   });
 });
+
+describe('bug-report template and README (DX-2, DX-12)', () => {
+  const template = fs.readFileSync(path.join(REPO, '.github/ISSUE_TEMPLATE/bug_report.md'), 'utf8');
+
+  test('the template asks for the doctor output with the Claude Code path and a lookup for other hosts', () => {
+    expect(template).toContain('~/.claude/skills/gstack/bin/gstack-doctor');
+    expect(template).toContain('./setup --status');
+    expect(template).toContain('/bin/gstack-paths --get GSTACK_STATE_ROOT');
+  });
+
+  test('the template names no bare gstack- command', () => {
+    for (const m of template.matchAll(/gstack-[a-z]/g)) expect(template.slice(0, m.index).endsWith('/bin/'), template.slice(m.index! - 40, m.index! + 20)).toBe(true);
+  });
+
+  test('README troubleshooting points at the doctor by absolute path', () => {
+    const readme = fs.readFileSync(path.join(REPO, 'README.md'), 'utf8');
+    const section = readme.slice(readme.indexOf('## Troubleshooting'));
+    expect(section).toContain('`~/.claude/skills/gstack/bin/gstack-doctor`');
+  });
+});