[marty916]

Aligns evals/mock_pdg with the discovery engine's behaviour, as verified on the live endpoint https://opportunity.aidlc.org/mcp/ on 2026-10-21.

Stacked on #95 (base fix/map-render-routing). It touches no plugin files, so there is no version bump.

Why

The mock's field sets already matched the engine. Its behaviour did not, and skills were tested against three invariants the engine doesn't have:

• identical reference formats across tools;
• a score-ranked list_problems;
• problems mapped 1:1 to opportunities.

The plan says to change the test and mock first when the shared subset differs, so that's the order here.

What changed

Behaviour	Before (mock)	Now (= engine)	Verified
Error text	CODE: msg	Error executing tool <name>: CODE: msg	live
get_lineage on an unknown problem	PROBLEM_NOT_FOUND	LINEAGE_NOT_FOUND	live
get_work_item_links on an unknown problem	error	empty, promoted: false	live
list_problems order	by score	creation order, newest first; list_opportunities stays ranked	live
evidence_references / source_evidence_refs	source:id	bare external id	live
list_evidence order	fixture order	newest first	live
lineage_ref	fixture:lin-*	equals problem_id	live
originating_sources	container-level refs	one source:id per evidence record	live
Unknown arguments	VALIDATION_ERROR	ignored	engine source

Still different, and documented in the README:

• every fixture problem is scored, so opportunities cover all problems;
• a non-string argument returns VALIDATION_ERROR rather than the SDK's schema message;
• where the engine places a null occurred_at is unverified (last here);
• MOCK_PDG_EVIDENCE_TEXT=off has no engine equivalent and is kept for degradation tests.

Tests first

Commit b3f43f4 replaced the three mock-only invariants with the engine's behaviour and added tests for the rest: 8 failed. This commit makes them pass.

Effect on existing skills

• Instructions: I checked every skill for reliance on the old invariants.
  • solution-framing's opportunity-source.md uses originating_sources for breadth. That still holds under the engine's semantics: distinct origins, study findings collapsed per study, and a single-source warning. No change.
  • The new skills already say list_problems is not a ranking.
• Static supplied captures (solution-framing eval files) are left as they are.
• The cluster-review test capture is regenerated from the aligned mock; its tests pass unchanged.
• Traces against the aligned mock (claude-opus-5, 1 rep each): opportunity-package pass, signal-intake pass, problem-clustering pass on a fresh run. The first clustering run was flagged by a harness false positive: a local hand-off file written by heredoc contained a record URL, which the https?:// pattern matched. Trace cases now forbid network commands (curl, wget, nc, Python HTTP clients) instead, and a regression test built from that shape pins it. Re-judging the flagged run under the new rule: pass.

Checks

• claude plugin validate . / plugins/aipos: passed.
• pytest tests -q: 911 passed, 6 skipped (after CodeRabbit fixes: instant-based ordering, non-object arguments refused, requests.request caught; all pinned by tests).

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes

  • Improved ordering for problems, opportunities, and evidence, including timezone-aware timestamps and opportunity ranking.
  • Improved lineage and evidence reference consistency across responses.
  • Unknown lineage requests now return a clear not-found error, while unknown work-item links return an empty result.
  • Tool errors now use the standard MCP format and reject invalid argument types.
  • Unrecognized arguments are safely ignored.
  • Improved network-request detection in command analysis, including heredoc commands, while allowing URLs in local file content.

• Documentation

  • Updated documented error codes and clarified supported behavior and known limitations.

[marty916]

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📝 Walkthrough

The mock PDG now matches engine-aligned ordering, identifiers, lineage behavior, and MCP error formatting. Fixtures and tests cover these contracts. Trace evaluation restricts network APIs while allowing URLs in local file content.

Changes: Mock PDG engine parity

Layer / File(s)	Summary
Align fixture records and references evals/mock_pdg/fixtures/default.json, tests/fixtures/cluster_review/mock-reads.json	Fixtures add creation timestamps and remove stored lineage fields. Cluster-review evidence uses unqualified identifiers, problem-specific lineage references, and updated ordering.
Match read ordering and lineage behavior evals/mock_pdg/server.py, tests/test_mock_pdg.py, evals/mock_pdg/README.md	Problem and evidence listings use timestamp ordering. Opportunities use score and strategic-weight ranking. Evidence references, lineage results, and unknown work-item links follow the documented contract.
Align tool arguments and error responses evals/mock_pdg/server.py, tests/test_mock_pdg.py, evals/mock_pdg/README.md	Tool dispatch ignores unknown arguments and rejects non-object arguments. Tool errors use the MCP SDK prefix. Tests and documentation cover these behaviors.

Trace network-use restrictions

Layer / File(s)	Summary
Restrict and test trace network calls evals/traces/cases.json, evals/run_traces.py, tests/test_run_traces.py	Trace cases detect network APIs and netcat. Heredoc normalization excludes local file contents from forbidden-command matching while preserving interpreter-fed scripts. Tests distinguish local file writes from network calls.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Possibly related issues

• Accelerated-Innovation/aipos-plugins#60: The changes update mock PDG behavior used by opportunity-package evaluations, but do not add the related write tools.
• Accelerated-Innovation/aipos-plugins#57: The changes update mock PDG behavior and signal-intake trace guards, but do not add the ingestion-status tool.
• Accelerated-Innovation/aipos-plugins#86: The changes update shared mock PDG behavior and evaluation traces, but do not complete the tracked skills or engine dependencies.

Merge Risk: 🟡 Moderate · up to 93f6e

The mock tool description misstates the ordering of listed problems. The trace network guard can be bypassed by a piped heredoc or an alternate import form, and it can misflag prose in tab-indented heredocs. These are eval-harness weaknesses, not production impact. Fix them before merge so the network-use rule can be trusted.

Security architecture risk: 🟡 Moderate · up to 93f6e

The change can report prohibited network-command attempts as acceptable, weakening confidence in read-only behavior. Existing execution restrictions limit immediate exposure, and broader production access is not demonstrated.

Retained concerns

• Medium · security · observed: Introduced heredoc normalization treats cat/tee input as inert without checking its consumer or shell expansion semantics. A command such as cat <<'EOF' | bash can contain a prohibited curl invocation in its body, yet that body is deleted before network-pattern checks. This weakens the control used to distinguish compliant read-only behavior from prohibited command attempts; it does not itself grant shell execution permission.

Security review details

Security Blast Radius

• inferred — The demonstrated scope is false-negative network-command detection in evaluation records, including the signal-intake and problem-clustering cases. Actual network effects additionally require execution permission and a reachable destination; the inspected change does not establish expanded production, tenant, or data-store access.

Security Findings and Attack Paths

• inferred — Untrusted model-emitted command text can place a prohibited network invocation inside a cat/tee heredoc consumed by a shell. Normalization removes the invocation, and subsequent checks see only the remaining command line. With otherwise satisfactory records, the evaluator can therefore return a passing verdict despite the prohibited attempt. Unquoted heredoc command substitutions expose the same distinction between apparent file content and executable behavior.

Trust Boundaries and Controls

• observed — Execution permission and retrospective evaluation are distinct controls. The existing regression cases preserve detection for direct curl calls and interpreter-first Python heredocs while allowing local-document prose. These are useful counterexamples, but they do not cover cat/tee pipelines or executable substitutions inside stripped bodies.

Hardening Proposals

• proposed — Preserve executable substitutions and interpreter-consumed heredoc content during evaluation. Exempt document bodies only when their inert use is established; otherwise retain them for checking. Add paired regression cases for quoted file writes, shell-consuming pipelines, and unquoted substitutions to protect the detection invariant.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 26.47% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 34 functions across 4 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly summarizes the primary change: aligning mock behavior with the live engine.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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⚠️ Outside diff range comments (1)

🟠 Major · Update the advertised list_problems description. · server.py:346

evals/mock_pdg/server.py:346
🎯 Functional Correctness | 🟠 Major | ⚡ Quick win

Update the advertised list_problems description.

tools/list still tells clients that list_problems returns the highest composite score first. Line 153 now returns creation order instead. A client that uses the tool description to select the first ranked problem can select the wrong problem. Describe creation order here and direct clients to list_opportunities for ranking.

🤖 Prompt for AI Agents

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only still-valid issues, skip the rest with a brief reason, keep changes
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Review comment at @evals/mock_pdg/server.py at line 346:
Update the advertised description for the list_problems entry in the tool
definitions to state that results are returned in creation order, and direct
clients to list_opportunities when they need ranked results. Leave the
surrounding paging configuration unchanged.

---

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Inline comments:
Review comments at @evals/mock_pdg/server.py:
- Line 140: Update the problem and evidence sorting logic around the visible
created_at sort and the corresponding evidence sort to parse timestamps and
compare their normalized instants rather than raw text. Preserve descending
chronological order, and ensure null evidence dates remain last.
- Line 445: The tool argument handling around the accepted-key filtering must
validate that arguments is an object before calling args.items(). For known
non-canary tools, reject non-object values such as nonempty arrays through the
existing TypeError path so malformed calls cannot terminate the stdio loop;
preserve filtering of unknown keys for valid object arguments.

Review comments at @evals/traces/cases.json:
- Line 72: Update both network-detection patterns in the trace evaluation
configuration to match calls to requests.request(), alongside the existing
requests HTTP methods. Add a failing-trace test covering a Python command that
invokes requests.request() with an HTTPS URL, ensuring evaluate() reports a
network-pattern violation.

---

Outside diff comments:
Review comments at @evals/mock_pdg/server.py:
- Line 346: Update the advertised description for the list_problems entry in the
tool definitions to state that results are returned in creation order, and
direct clients to list_opportunities when they need ranked results. Leave the
surrounding paging configuration unchanged.

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Inline comments:
Review comments at @evals/traces/cases.json:
- Line 72: Update the HTTP-call detection patterns in both referenced cases to
match requests.Session() method calls, including common request verbs, alongside
the existing requests.request/get/post/put/patch/delete patterns. Add a
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🟡 Minor · Normalize naive fixture timestamps before ordering. · server.py:314-318

evals/mock_pdg/server.py:314-318
🩺 Stability & Availability | 🟡 Minor | ⚡ Quick win

Normalize naive fixture timestamps before ordering.

MOCK_PDG_FIXTURE accepts alternate JSON fixtures without date validation. A fixture can therefore mix naive ISO timestamps with Z or offset-aware timestamps. _by_creation() and list_evidence() pass the resulting naive and aware datetime values to sorted(), which raises TypeError. The request handler converts that exception into VALIDATION_ERROR instead of returning the engine-aligned order.

Suggested fix

-from datetime import datetime
+from datetime import datetime, timezone
...
 def _instant(stamp: str) -> datetime:
     """Compare timestamps as instants: the engine writes `+00:00`, fixtures often `Z`."""
-    return datetime.fromisoformat(stamp.replace("Z", "+00:00"))
+    parsed = datetime.fromisoformat(stamp.replace("Z", "+00:00"))
+    return parsed if parsed.tzinfo is not None else parsed.replace(tzinfo=timezone.utc)

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Review comment at @evals/mock_pdg/server.py around lines 314 - 318:
Update _instant to normalize naive parsed datetimes to UTC by importing timezone
and assigning timezone.utc when parsed.tzinfo is absent, while preserving
existing aware timestamps unchanged so _by_creation and list_evidence can sort
mixed fixture timestamps.

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Inline comments:
Review comments at @evals/traces/cases.json:
- Line 72: Update both forbidden-network pattern locations to detect aliased
requests imports and subsequent aliased HTTP method calls, while preserving
existing direct requests and other-library matching. Add the aliased requests
command to the network-pattern regression cases and assert it is rejected.

---

Outside diff comments:
Review comments at @evals/mock_pdg/server.py:
- Around line 314-318: Update _instant to normalize naive parsed datetimes to
UTC by importing timezone and assigning timezone.utc when parsed.tzinfo is
absent, while preserving existing aware timestamps unchanged so _by_creation and
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @evals/traces/cases.json:
- Line 71: The import detection in evaluate() must not classify import-like
prose inside heredoc or local-write content as Python code. Restrict matching to
executable Python commands or otherwise exclude file content, while preserving
existing prose-only local-write behavior and adding regression coverage for both
“from requests” and “import requests” prose cases.
- Line 71: The network-import denylist regex in the cases at the shown entries
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Inline comments:
Review comments at @evals/run_traces.py:
- Line 135: Update _FILE_HEREDOC so <<- heredocs recognize terminators preceded
by tab characters, while retaining the existing unindented terminator behavior
for standard << heredocs and preserving the captured body boundaries.
- Line 135: The _FILE_HEREDOC filtering must retain heredoc bodies when the
command is piped or otherwise potentially executable, including cat/tee heredocs
sent to sh, so evaluate still detects curl and other forbidden patterns.
Restrict body exclusion to unambiguously standalone local-file writes and
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