diff --git a/docs/superpowers/plans/2026-07-24-upstream-feedback.md b/docs/superpowers/plans/2026-07-24-upstream-feedback.md
new file mode 100644
index 0000000..35170a0
--- /dev/null
+++ b/docs/superpowers/plans/2026-07-24-upstream-feedback.md
@@ -0,0 +1,187 @@
+# Upstream Feedback Rule Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Add a shared agent rule that recommends reporting bugs to relevant upstream libraries while requiring separate user approvals before drafting and before submission.
+
+**Architecture:** Extend the existing provenance policy because it already governs referenced and ported-from upstream work. Validate the wording with a focused content assertion and the repository's existing rules-index link check, then merge the completed branch into local `main`.
+
+**Tech Stack:** Markdown, Python 3 standard library, Git
+
+## Global Constraints
+
+- Apply the rule to libraries used as references, implementation guides, or sources of ports.
+- Recommend an upstream issue or pull request; do not start one automatically.
+- Require explicit user permission before preparing an upstream-facing issue draft or pull-request patch.
+- Require separate explicit user permission immediately before external submission.
+- Permission to draft must never imply permission to submit.
+- Do not change authorization for repository-local investigation or requested local fixes.
+
+---
+
+### Task 1: Add and validate the upstream feedback rule
+
+**Files:**
+- Modify: `rules/common/provenance.md`
+- Modify: `rules/index.md`
+
+**Interfaces:**
+- Consumes: the provenance policy linked from `rules/index.md`
+- Produces: a new `Return Upstream Bug Findings` policy section
+
+- [ ] **Step 1: Run a focused check that demonstrates the rule is absent**
+
+Run:
+
+```bash
+python3 - <<'PY'
+from pathlib import Path
+
+text = Path("rules/common/provenance.md").read_text(encoding="utf-8")
+normalized = " ".join(text.split())
+required = [
+    "## Return Upstream Bug Findings",
+    "before preparing an upstream-facing issue draft or pull-request patch",
+    "separate explicit permission immediately before creating the issue or pull request",
+    "Permission to prepare a draft does not authorize external submission.",
+]
+missing = [fragment for fragment in required if fragment not in normalized]
+assert not missing, f"missing upstream-feedback policy fragments: {missing}"
+PY
+```
+
+Expected: FAIL with `missing upstream-feedback policy fragments`.
+
+- [ ] **Step 2: Add the minimal policy section**
+
+Append this section to `rules/common/provenance.md`:
+
+```markdown
+## Return Upstream Bug Findings
+
+- When work reveals a likely bug in a library used as a reference,
+  implementation guide, or source of a port, report the finding and supporting
+  evidence to the user. Recommend giving the finding back to upstream as an
+  issue or pull request.
+- Ask for explicit user permission before preparing an upstream-facing issue
+  draft or pull-request patch. If permission is not given, do not begin that
+  upstream-facing draft or patch.
+- Show the completed draft or patch to the user, then ask for separate explicit
+  permission immediately before creating the issue or pull request upstream.
+  Permission to prepare a draft does not authorize external submission.
+- These approval requirements govern upstream-facing preparation and
+  submission. They do not by themselves restrict repository-local
+  investigation or fixes already requested by the user.
+```
+
+- [ ] **Step 3: Re-run the focused policy check**
+
+Run the Python command from Step 1.
+
+Expected: PASS with exit status 0 and no output.
+
+- [ ] **Step 4: Advertise the policy in the rules index**
+
+Extend the `common/provenance.md` description in `rules/index.md` to include:
+
+```text
+permission-gated upstream bug feedback
+```
+
+Run:
+
+```bash
+python3 - <<'PY'
+from pathlib import Path
+
+text = " ".join(Path("rules/index.md").read_text(encoding="utf-8").split())
+required = "permission-gated upstream bug feedback"
+assert required in text, f"rules index does not advertise: {required}"
+PY
+```
+
+Expected: PASS with exit status 0 and no output.
+
+- [ ] **Step 5: Run repository validation**
+
+Run:
+
+```bash
+python3 - <<'PY'
+import pathlib
+import re
+
+rules = pathlib.Path("rules")
+text = (rules / "index.md").read_text(encoding="utf-8")
+links = re.findall(r"\]\(([^)#]+\.md)[^)]*\)", text)
+missing = sorted({link for link in links if not (rules / link).exists()})
+assert not missing, f"broken links in rules/index.md: {missing}"
+print(f"rules/index.md OK: {len(links)} relative links resolve")
+PY
+
+git diff --check
+```
+
+Expected: `rules/index.md OK: 10 relative links resolve`; `git diff --check` exits successfully.
+
+- [ ] **Step 6: Commit the rule**
+
+```bash
+git add rules/common/provenance.md rules/index.md
+git commit -m "rules: require approval for upstream feedback"
+```
+
+Expected: one commit containing the provenance policy and its index description.
+
+### Task 2: Verify and merge the completed branch
+
+**Files:**
+- Verify: `docs/superpowers/specs/2026-07-24-upstream-feedback-design.md`
+- Verify: `docs/superpowers/plans/2026-07-24-upstream-feedback.md`
+- Verify: `rules/common/provenance.md`
+- Verify: `rules/index.md`
+
+**Interfaces:**
+- Consumes: the validated `provenance-rules` branch
+- Produces: local `main` containing the completed provenance and upstream-feedback rules
+
+- [ ] **Step 1: Run final branch verification**
+
+Run the focused policy check and repository validation from Task 1, then:
+
+```bash
+git diff --check main...HEAD
+git status --short
+```
+
+Expected: all checks pass; only the locally generated `.codegraph/` directory may remain untracked.
+
+- [ ] **Step 2: Confirm the commits to merge**
+
+Run:
+
+```bash
+git log --oneline --decorate main..HEAD
+```
+
+Expected: only the provenance-rule work, its design and plan, and the upstream-feedback rule commit are listed.
+
+- [ ] **Step 3: Merge into local main**
+
+```bash
+git switch main
+git merge --ff-only provenance-rules
+```
+
+Expected: local `main` advances by fast-forward with no conflicts.
+
+- [ ] **Step 4: Verify the merged result**
+
+Run the focused policy check and repository validation from Task 1, then:
+
+```bash
+git status --short --branch
+git log -4 --oneline --decorate
+```
+
+Expected: validation passes and `main` points to the upstream-feedback rule commit; `.codegraph/` may remain untracked and is not committed.
diff --git a/docs/superpowers/specs/2026-07-24-upstream-feedback-design.md b/docs/superpowers/specs/2026-07-24-upstream-feedback-design.md
new file mode 100644
index 0000000..4d94980
--- /dev/null
+++ b/docs/superpowers/specs/2026-07-24-upstream-feedback-design.md
@@ -0,0 +1,48 @@
+# Upstream Feedback Rule Design
+
+## Goal
+
+Encourage agents to return useful bug findings to upstream libraries that were
+used as references, consulted during implementation, or served as the source
+of a port, while keeping all upstream-facing work under explicit user control.
+
+## Placement
+
+Add the rule to `rules/common/provenance.md`. The existing file already governs
+how agents handle relationships with referenced and ported-from upstream work,
+so it is a better fit than the general repository workflow rules or a new
+standalone rule file.
+
+## Required Behavior
+
+When an agent identifies a likely bug in a relevant upstream library, it
+should:
+
+1. Report the finding and supporting evidence to the user.
+2. Recommend giving the finding back to upstream as an issue or pull request.
+3. Ask for explicit permission before starting an upstream-facing issue draft
+   or pull-request patch.
+4. Show the completed draft or patch to the user.
+5. Ask for separate explicit permission immediately before creating the issue
+   or pull request upstream.
+
+Permission to prepare a draft does not authorize external submission. If
+permission is not given at either stage, the agent must stop that upstream
+feedback activity at the corresponding boundary.
+
+## Scope
+
+This rule applies to upstream libraries used as a reference, consulted as an
+implementation guide, or used as the source of a port. It governs preparation
+and submission of upstream issues and pull requests; it does not by itself
+change authorization for repository-local investigation or fixes requested by
+the user.
+
+## Validation
+
+Review the final wording to ensure that:
+
+- upstream feedback is recommended rather than performed automatically;
+- permission is required before drafting;
+- a second permission is required before submission; and
+- draft permission cannot be interpreted as submission permission.
diff --git a/rules/common/provenance.md b/rules/common/provenance.md
index 84f55c3..564aad8 100644
--- a/rules/common/provenance.md
+++ b/rules/common/provenance.md
@@ -45,3 +45,19 @@ of writing, not reconstructed later.
 - Follow the affected repository's citation policy style where one exists:
   cite original algorithm papers, cite upstream library papers, and apply
   upstream citation policies recursively.
+
+## Return Upstream Bug Findings
+
+- When work reveals a likely bug in a library used as a reference,
+  implementation guide, or source of a port, report the finding and supporting
+  evidence to the user. Recommend giving the finding back to upstream as an
+  issue or pull request.
+- Ask for explicit user permission before preparing an upstream-facing issue
+  draft or pull-request patch. If permission is not given, do not begin that
+  upstream-facing draft or patch.
+- Show the completed draft or patch to the user, then ask for separate explicit
+  permission immediately before creating the issue or pull request upstream.
+  Permission to prepare a draft does not authorize external submission.
+- These approval requirements govern upstream-facing preparation and
+  submission. They do not by themselves restrict repository-local
+  investigation or fixes already requested by the user.
diff --git a/rules/index.md b/rules/index.md
index 9a129bb..eb2c325 100644
--- a/rules/index.md
+++ b/rules/index.md
@@ -13,7 +13,8 @@ load language-specific rules when the task touches that language.
   examples, tests, benchmarks, and validation quality.
 - [`common/provenance.md`](common/provenance.md): recording references to
   third-party code in the source, copyright compliance for ports and
-  translations, and scientific credit via provenance and citation policies.
+  translations, scientific credit via provenance and citation policies, and
+  permission-gated upstream bug feedback.
 
 ## Rust