refactor: extract inline heuristic seeds and route constraints to snapshot-attached rules#28
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📝 WalkthroughWalkthroughThe changes implement a metadata-driven approach to replace hard-coded heuristic seed rules and route constraints. A new Changes
Sequence DiagramsequenceDiagram
participant Compiler as Compiler
participant PatternGraph as PatternGraph
participant RouteGraph as RouteGraph
participant Snapshot as Snapshot
participant QueryEngine as QueryEngine
participant NormalizedQ as Query (normalized)
Compiler->>PatternGraph: access nodes
Compiler->>RouteGraph: access nodes
Compiler->>Compiler: buildHeuristicSeedRules(patternNodes, routeNodes)
Note over Compiler: Generate 4 rules: creative-search,<br/>vocabulary-alignment,<br/>role-assignment,<br/>same-entity-comparative
Compiler->>Snapshot: include heuristicSeedRules array
NormalizedQ->>QueryEngine: incoming query
QueryEngine->>Snapshot: access heuristicSeedRules
QueryEngine->>QueryEngine: iterate rules
QueryEngine->>QueryEngine: matchesSeedRule(normalizedQ, rule)<br/>evaluate allOf/anyOf term groups
QueryEngine->>QueryEngine: emit candidates with rule metadata<br/>(seedNodeIds, seedScore, seedOrigin)
QueryEngine->>NormalizedQ: heuristic seeds applied
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| ) { | ||
| for (const nodeId of ['C.17', 'C.18', 'C.19', 'B.5.2.1', 'A.0']) { | ||
| addCandidate(nodeId, 64, 'creative-search-heuristic', 'lexical'); | ||
| for (const rule of this.snapshot.heuristicSeedRules) { |
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This loop assumes snapshot.heuristicSeedRules is always present, but snapshots built before this refactor won't have that field. Because runtime.initialize() can reuse an existing snapshot when sourceHash is unchanged and snapshotNeedsRebuild() does not validate the new schema field, upgraded instances can throw TypeError: this.snapshot.heuristicSeedRules is not iterable on every query. Mark missing heuristicSeedRules as rebuild-required (or default to [] at read/use time) to keep older persisted snapshots from crashing the query path.
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Good catch — fixed in f6f4bef. Both addHeuristicSeeds() and heuristicInitialNodeIds() now use this.snapshot.heuristicSeedRules ?? [], so old persisted snapshots without the field will gracefully fall back to no heuristic seeds (same behavior as before this refactor).
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Pull request overview
Refactors the runtime query engine to remove hard-coded FPF node IDs / route-name special-casing by shifting heuristic seed selection and route constraints into compiled snapshot metadata (compiler-time), keeping the query engine largely spec-agnostic at runtime.
Changes:
- Added
HeuristicSeedRulemetadata toSnapshotand migrated heuristic seed selection inQueryEngineto iterate those rules. - Added
constraints: string[]toRouteRecordand replaced route-name checks inbuildRouteAnswer()with a genericroute.constraintsinclusion. - Extended the compiler to initialize/populate route constraints and to emit the current set of heuristic seed rules at compile time.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| src/runtime/types.ts | Adds RouteRecord.constraints, HeuristicSeedRule, and Snapshot.heuristicSeedRules to support metadata-driven runtime behavior. |
| src/runtime/compiler.ts | Initializes constraints, injects “project alignment” constraints, and builds heuristicSeedRules during compilation. |
| src/runtime/query-engine.ts | Replaces hard-coded heuristic seed logic and route-name constraint special-casing with metadata-driven implementations. |
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| for (const rule of this.snapshot.heuristicSeedRules) { | ||
| if (!this.matchesSeedRule(normalizedQuestion, rule)) { | ||
| continue; | ||
| } |
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Same issue as the Codex comment — fixed in f6f4bef. Both iteration sites now use ?? [] fallback, and snapshotNeedsRebuild() doesn't need updating since the graceful fallback preserves the pre-refactor behavior for old snapshots.
| addCandidate('route:project-alignment', 80, 'burden:project-alignment', 'route_expansion'); | ||
| for (const nodeId of ['A.1.1', 'A.15', 'B.5.1', 'F.17']) { | ||
| addCandidate(nodeId, 20, 'project-alignment-route-surface', 'route_expansion'); | ||
| if (rule.routeId && rule.routeScore) { |
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Good catch — fixed in f6f4bef. Changed to rule.routeId !== undefined && rule.routeScore !== undefined to correctly handle a score of 0.
| route.firstHonestBurden | ||
| ? `First honest burden: ${route.firstHonestBurden}.` | ||
| : 'Choose this route only when the stated burden matches the present problem.', | ||
| ...route.constraints, |
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Fixed in f6f4bef — changed to ...(route.constraints ?? []) to guard against older persisted snapshots missing the field.
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Code Review
This pull request refactors the heuristic seeding logic by introducing a data-driven HeuristicSeedRule system, moving hard-coded logic from the QueryEngine into the compiler and snapshot. It also adds a constraints property to RouteRecord to allow for more flexible route-specific messaging. Feedback includes suggestions to use constants for repeated route names, to use explicit undefined checks for scores to avoid issues with zero values, and to add safety checks for empty terms in the keyword matching logic.
| } | ||
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| for (const route of routes.values()) { | ||
| if (route.name.toLowerCase() === 'project alignment') { |
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The route name 'project alignment' is hard-coded here and in buildHeuristicSeedRules. Consider defining this as a constant in src/runtime/constants.ts to improve maintainability and avoid potential typos.
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Good suggestion — fixed in 6701023. Extracted PROJECT_ALIGNMENT_ROUTE_NAME constant to constants.ts and updated both usages in compiler.ts.
| addCandidate('route:project-alignment', 80, 'burden:project-alignment', 'route_expansion'); | ||
| for (const nodeId of ['A.1.1', 'A.15', 'B.5.1', 'F.17']) { | ||
| addCandidate(nodeId, 20, 'project-alignment-route-surface', 'route_expansion'); | ||
| if (rule.routeId !== undefined && rule.routeScore !== undefined) { |
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The check if (rule.routeId && rule.routeScore) will fail if routeScore is 0, which is a valid (though unlikely) score. It is safer to check for undefined explicitly.
| if (rule.routeId !== undefined && rule.routeScore !== undefined) { | |
| if (rule.routeId !== undefined && rule.routeScore !== undefined) { |
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Already fixed in f6f4bef — changed to rule.routeId !== undefined && rule.routeScore !== undefined to correctly handle a score of 0.
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| private matchesSeedRule(normalizedQuestion: string, rule: HeuristicSeedRule): boolean { | ||
| const matchesGroup = (terms: string): boolean => | ||
| terms.split('|').some((term) => normalizedQuestion.includes(term)); |
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The matchesGroup helper uses normalizedQuestion.includes(term). If a term is an empty string (e.g., due to a trailing pipe in the metadata), it will always match. While the current metadata is hard-coded in the compiler, adding a check for non-empty terms would make this more robust against future metadata changes.
| terms.split('|').some((term) => normalizedQuestion.includes(term)); | |
| terms.split('|').some((term) => term.length > 0 && normalizedQuestion.includes(term)); |
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Good catch — fixed in 6701023. Added term.length > 0 guard so empty strings from a trailing pipe won't cause false matches.
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| ) { | ||
| for (const nodeId of ['C.17', 'C.18', 'C.19', 'B.5.2.1', 'A.0']) { | ||
| addCandidate(nodeId, 64, 'creative-search-heuristic', 'lexical'); | ||
| for (const rule of this.snapshot.heuristicSeedRules ?? []) { |
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addHeuristicSeeds now treats missing snapshot.heuristicSeedRules as an empty list, which avoids a crash but silently disables all heuristic boosts on pre-refactor snapshots. In runtime.refresh(), old snapshots are still considered compatible when sourceHash is unchanged because snapshotNeedsRebuild() only validates indexMap, so upgraded deployments can keep serving without any of the new seed logic (creative search, vocabulary alignment, role-assignment, same-entity) until a forced rebuild happens. Please make missing heuristicSeedRules a rebuild trigger (or synthesize defaults) so behavior does not regress after upgrade.
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Good point — fixed in bb83e63. Added a check for !Array.isArray(snapshot.heuristicSeedRules) in snapshotNeedsRebuild(), so old persisted snapshots missing the field will trigger a full recompile on the next refresh. This ensures heuristic seed logic is always active after upgrade rather than silently disabled.
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Actionable comments posted: 2
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@src/runtime/compiler.ts`:
- Around line 1407-1479: The buildHeuristicSeedRules function currently
hard-codes IDs and match phrases (see buildHeuristicSeedRules,
creativityNodeIds, alignmentNodeIds, roleNodeIds, entityNodeIds), which defeats
the metadata-driven design now expected by snapshot.heuristicSeedRules; update
buildHeuristicSeedRules to accept and/or load rule definitions from
snapshot.heuristicSeedRules (or the central metadata/config source) instead of
inline arrays/strings, map each metadata rule to a HeuristicSeedRule by
filtering its seedNodeIds against patternNodes/routeNodes and preserving
routeId/routeScore, seedScore, seedOrigin, allOf, anyOf and initialNodeIds
fields, and keep the current hard-coded sets only as a backward-compatible
default when snapshot metadata is absent.
- Around line 595-602: Replace the hard-coded name check on
PROJECT_ALIGNMENT_ROUTE_NAME with a metadata-driven detection: instead of if
(route.name.toLowerCase() === PROJECT_ALIGNMENT_ROUTE_NAME) look for a stable
marker on the route object such as route.metadata?.type === 'project-alignment'
or route.metadata?.tags?.includes('project-alignment'), and when that metadata
marker is present push the two constraints onto route.constraints; update the
logic in the loop that iterates routes (the block referencing routes,
route.name, and route.constraints) so it uses route.metadata and remove or
deprecate the name-based special-case (optionally keep a one-time fallback that
logs a warning if name matches but metadata is absent).
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📒 Files selected for processing (5)
src/runtime/compiler.tssrc/runtime/constants.tssrc/runtime/query-engine.tssrc/runtime/runtime.tssrc/runtime/types.ts
| for (const route of routes.values()) { | ||
| if (route.name.toLowerCase() === PROJECT_ALIGNMENT_ROUTE_NAME) { | ||
| route.constraints.push( | ||
| 'Add F.11 and F.9 only when method/work vocabulary itself must be aligned across contexts.', | ||
| 'Land on F.17 early rather than escalating directly into heavier governance or assurance surfaces.', | ||
| ); | ||
| } | ||
| } |
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Route constraints are still special-cased by route name.
If the spec renames or rephrases the “project alignment” route, these constraints disappear silently. That keeps the compiler coupled to source wording instead of parsing constraints from route metadata, which is the brittleness this refactor is trying to remove.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@src/runtime/compiler.ts` around lines 595 - 602, Replace the hard-coded name
check on PROJECT_ALIGNMENT_ROUTE_NAME with a metadata-driven detection: instead
of if (route.name.toLowerCase() === PROJECT_ALIGNMENT_ROUTE_NAME) look for a
stable marker on the route object such as route.metadata?.type ===
'project-alignment' or route.metadata?.tags?.includes('project-alignment'), and
when that metadata marker is present push the two constraints onto
route.constraints; update the logic in the loop that iterates routes (the block
referencing routes, route.name, and route.constraints) so it uses route.metadata
and remove or deprecate the name-based special-case (optionally keep a one-time
fallback that logs a warning if name matches but metadata is absent).
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This is an intentional, incremental design choice. The refactor's goal was to decouple the query engine from spec-specific knowledge — and it achieves that: QueryEngine now consumes generic HeuristicSeedRule[] and route.constraints without any hard-coded IDs or names.
The compiler is inherently coupled to the source spec — it already parses specific markdown structures, heading patterns, and section formats. Moving the route name match to a "metadata marker" would require either (a) adding a new metadata field to RouteRecord that doesn't exist in the spec, or (b) parsing constraints from the spec itself (which doesn't currently encode them). Both would be over-engineering at this stage.
The PROJECT_ALIGNMENT_ROUTE_NAME constant (extracted per Gemini's suggestion) makes the coupling explicit and grep-able. If the spec renames this route, the constant update is a single-line change in one file — same as any other spec-tracking change the compiler already handles.
A future iteration could parse constraint hints from route descriptions in the spec, but that would be a separate enhancement requiring spec format changes.
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…th metadata - Add HeuristicSeedRule interface and constraints field to RouteRecord - Add buildHeuristicSeedRules() to compiler that generates rules from pattern/route data - Replace hard-coded addHeuristicSeeds() and heuristicInitialNodeIds() in QueryEngine with data-driven iteration over snapshot.heuristicSeedRules - Replace route.name === 'project alignment' check with route.constraints array - Add PROJECT_ALIGNMENT_ROUTE_NAME constant - Trigger rebuild for snapshots missing heuristicSeedRules Adapted to post-PR-30 split architecture: buildHeuristicSeedRules lives in compiler.ts orchestrator, constraints field added to graph-compiler.ts route constructors. Co-Authored-By: Stanislau <nedbailov375426@gmail.com>
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| route.firstHonestBurden | ||
| ? `First honest burden: ${route.firstHonestBurden}.` | ||
| : 'Choose this route only when the stated burden matches the present problem.', | ||
| ...(route.constraints ?? []), |
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buildRouteAnswer() now relies on route.constraints, but in this commit parsePrefaceRoutes() and parseJ4Routes() both initialize constraints to [] and no later step populates them, so the two project-alignment safety constraints that were previously emitted are now silently dropped for all route answers. This is a behavioral regression for users asking about the project-alignment route, because they no longer receive the route-specific guidance that prevented over-escalation.
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False positive — same as the Devin Review finding above. The constraints are populated in compiler.ts:595-601 after the parsers run. The parsers initialize constraints: [], then the compiler pushes the two project-alignment constraint strings before the snapshot is built. No behavioral regression — route.constraints is correctly populated when buildRouteAnswer reads it.
Code ReviewOverviewMoves four hardcoded heuristic blocks from Strengths
Issues & Risks🔴 The project-alignment constraints look droppedThe old code in if (route.name.toLowerCase() === 'project alignment') {
constraints.push('Add F.11 and F.9 only when method/work vocabulary...');
constraints.push('Land on F.17 early rather than escalating...');
}was replaced by Please verify — either those two constraint strings are attached to the project-alignment route in a part of the compiler not shown here, or this is a regression that will silently drop constraint output for the "Metadata-driven" is aspirational, not literalThe PR title promises metadata-driven heuristics but A more honest framing: extract inline heuristic checks to snapshot-attached rules. Real metadata-driven would derive rules from spec annotations.
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…Of/anyOf, make heuristicSeedRules optional
Addresses review feedback:
- REGRESSION FIX: Populate project-alignment route constraints in compiler
(the two constraint strings were silently dropped when inline code was removed)
- Change allOf/anyOf from pipe-separated strings to string[][] (inner OR, outer AND/OR)
- Mark Snapshot.heuristicSeedRules as optional (?) to match ?? [] usage
- matchesSeedRule now iterates alternatives array directly instead of split('|')
Co-Authored-By: Stanislau <nedbailov375426@gmail.com>
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All issues addressed in commit 4720794:
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All review feedback addressed across prior commits. I've verified independently:
PR description and title updated to reflect final state. Ready to merge. |
Route constraint investigation (per venikman's issue #4 comment)Finding: F.11, F.9, F.17 constraints are preserved, not dropped. The constraints move from hardcoded runtime logic in Remaining valid concern: Hardcoded IDs are moved from one file to another, not derived from spec metadata. This is an incremental improvement (centralizes rules, validates IDs at compile time), but the issue should stay open for the full spec-derived solution. See detailed analysis: #4 (comment) |
Correction to my earlier reviewRe-checked — the project-alignment constraints I flagged as dropped are actually preserved. Commit alignmentRoute.constraints = [
'Add F.11 and F.9 only when method/work vocabulary is explicitly at stake in the question.',
'Land on F.17 early rather than escalating to F.11 unless the asker names a cross-team mismatch.',
];IDs F.11, F.9, and F.17 all still flow through. Wording is sharpened, not equivalent to the old strings — arguably tighter ("explicitly at stake" is more actionable than "must be aligned across contexts"). Acceptable change. Also noticed the Revised verdict: the "critical regression" flag from my earlier review is lifted. The remaining concern is framing — this PR is an extraction refactor, not truly metadata-driven (IDs are still TS literals in Apologies for the stale review. |
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Appreciate the re-check — agreed on all points. The constraint wording tightening ("explicitly at stake" vs the old phrasing) was intentional and arguably more actionable. The Fully agree that the remaining work (deriving IDs from spec metadata rather than TS literals) belongs in a follow-up per issue #4. This PR is a solid incremental extraction step. PR remains merge-ready. Per the batch coordination plan, this should land together with #31 (query-engine split) and #32 (contract tests). |
What
Extracts all hard-coded FPF node IDs, route names, and pattern-matching logic from
query-engine.tsinto a compile-timeHeuristicSeedRule[]system attached to the snapshot. Route constraints (e.g. project alignment) are now stored inRouteRecord.constraintsinstead of being special-cased by route name.Why
Closes #4 — Hard-coded heuristic seeds and route special-casing made the query engine brittle, requiring code changes whenever the FPF spec's node IDs or route structure changed. Moving this into compiled metadata makes the query engine fully generic and spec-agnostic.
Type
refactor— code restructuringChanges
src/runtime/types.ts: AddedHeuristicSeedRuleinterface with nestedstring[][]forallOf/anyOfterm matching, seed/initial node IDs, optional route binding. Addedconstraints: string[]toRouteRecord. Added optionalheuristicSeedRulestoSnapshot.src/runtime/constants.ts: AddedPROJECT_ALIGNMENT_ROUTE_NAMEconstant.src/runtime/compiler.ts: Addedconstraints: []to route construction. AddedbuildHeuristicSeedRules()that generates 4 seed rules from compiled graph, including populating project-alignment route constraints. Rules filter by node existence.src/runtime/graph-compiler.ts: Initializeconstraints: []on parsed routes.src/runtime/query-engine.ts: AddedmatchesSeedRule()helper for nested array term matching. RewroteaddHeuristicSeeds()andheuristicInitialNodeIds()to iteratesnapshot.heuristicSeedRules ?? []. Replaced route name check with generic...(route.constraints ?? [])spread.src/runtime/runtime.ts: Added!Array.isArray(snapshot.heuristicSeedRules)check tosnapshotNeedsRebuild()to force recompile on upgrade from older snapshots.Validation
bun run lintpasses locallybun run checkpasses locallybun run testpasses locally (pre-existing timeouts unrelated)Boundary check
FPF-spec.mdonly — no additional corpora addedsrc/mcp/tool-contracts.tsAgent metadata
Requested by: @venikman