[mpapis]

Blast radius first: every multi-def single-pick answer, ALL languages, may change — --around/--lego/--edit-check and the --lsp definition/hover/workspace-symbol lanes. Each flip class is pinned by a byte-asserted test/lspcheck.sh arm (18/18b/19/20/21/23); the map output itself is byte-identical to the base binary on this repo (query-time-only ordering — buildGraph's edge candidates untouched, kParserVer stays, caches valid; the edge-vs-display gap is disclosed on the row, arm (23)).

Before/after on the hand fixture (def name + attr + schema column + YAML key; real bytes):

surface	before	after
--around=name focus	<s t="var" n="name" sc="AllFour">	<s t="method" n="name" sc="AllFour">
workspace/symbol "name" row 1	attr all_four.rb:8	def all_four.rb:10; schema column before the YAML section
--lsp definition front	lowest-id arbitrary	tower front; multi-def answers carry one window/logMessage disclosure ahead of the list
hover on a split name	silent pick	N definitions for name — counts are floors; the resolver splits over them.

Pieces: C1 hoist the dedup ladder → shared kindSpecificity (model.h, then §3 table + reorder anchors); C2 applyNameTower total order on both resolvers' name tiers (tiers preserved, tower orders within); C3 resolveFocus keeps front(), every stale "lowest-id" sentence corrected (incl. the emitted legends + MCP descriptions); C4 the one disclosure sentence. Red-first per the campaign DoD — arms committed RED-on-base first (7e4c8424). Part of the RIPWIRE-RUBY campaign (prior landings: A2 #339, mixin seam #412); task C itself is a private campaign task with no tracked issue.

Verification: lspcheck 25 arms ALL PASS (floor + new, red→green proven at each commit); determinism ×2; xmllint; map byte-identical vs the base binary built from b59b0824 (parity re-proven in-container); targeted batteries 13/13 + 18/18 in leap-build (graph.h/legend/MCP families — full suite left to CI per CONTRIBUTING §1); ASan+LSAN clean at the C4 head (0 findings), re-armed by connectcorecheck's sanitizer arm at iteration 2; --quality-delta=origin/main..HEAD: regressions=0 gating=0 (3 acked shape rows carry their reasons). Five changes-max review-fix iterations ran post-implementation: 30 findings fixed, every test-strengthening commit shipped with a red-control proof; the final commits are prose/gate-class. Zed in-editor check per docs/LSP.md D2: pending with the maintainer (protocol-level proofs are arm-pinned).

Attribution note: the per-commit trailers carry the campaign's standard AI-assistance line from the task handoff template; the model assistance on THIS pull request specifically was Qwen 3.8 Flash only, under @mpapis's supervision — no DeepSeek pass.

Authored by @mpapis with AI assistance (Qwen 3.8 Flash) under his supervision.

Summary by CodeRabbit

• New Features
  • Symbol lookups now prioritize the most specific match, with consistent selection across navigation, ownership, and edit checks.
  • Hover and definition results disclose when a name matches multiple definitions.
• Bug Fixes
  • C and C++ declarations now resolve to a matching same-scope definition when available.
  • Edit checks and previews consistently use the selected match, even when results arrive in a different order.
• Tests
  • Expanded coverage for symbol ordering, multi-definition notices, and consistent results across repeated lookups.

[coderabbitai]

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Walkthrough

Name-resolution results now use tower ordering, and consumers use the resulting focus node. LSP definition and hover responses disclose multiple definitions. Tests cover collision ordering, focus selection, and disclosure behavior.

Changes: Name resolution and selection

Layer / File(s)	Summary
Rank name matches and select focus nodes src/model.h, src/ingest_model.h, src/graph.h	A shared specificity table ranks symbol kinds. Bare-name and name/file matches use kind, language, and ID ordering. resolveFocus prefers a same-scope C/C++ body when the tower front is bodyless.
Use the tower-front focus across commands src/editcheck.h, src/editpreview.h, src/mcpverbs.h, src/verbs_navigate.h, src/verbs_quality.h, src/verbs_report.h, src/compactlegend.h, src/serialize.h, src/graphlegend.h, test/decltodefcheck.sh, test/mcphandlecheck.sh, test/ownerscheck.sh, test/compactlegendcheck.sh, .ripwire_quality_acks	Edit-check paths use focusNode. Safe-delete and related selection descriptions use tower ordering. Tests and compact-legend expectations reflect the updated ordering. The quality-acknowledgement ledger records additional acknowledgements and removes a prior entry.
Disclose multiple definitions in LSP src/lsp.h, test/lspcheck.sh, .ripwire_quality_acks	Definition responses send a multiple-definition notice before the result. Hover adds a definition-count sentence. Tests cover collision ordering, notices, hover behavior, and deterministic output.

Priority: Normal

Estimated code review effort: 4 (Complex) | ~35 minutes

Change: Feature

Suggested reviewers: joyful-ii-v-i

Merge Risk: Low · up to 75df8

Ordering of multi-definition name answers is deterministic. In a narrow C/C++ case, a forward-declared class or struct can lose focus to a same-named function in the same scope. This affects the focus used by commands such as --around and --edit-check. It is a bounded edge case that can be fixed before or shortly after merge.

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Title check		The title clearly summarizes the main changes: unified ordering for multi-definition name answers and split disclosure in LSP.
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[joyful-ii-V-I]

Thanks @mpapis, this is a really useful change. One total order for every multi-definition name, and one disclosure sentence on top of it, closes a gap we've been working around in several verbs. The red-first arms for each flip class and the byte-identical map make it easy to review.

Landing order. Our train 33 integration PR is in its final checks now, and we'll take a measurement round on that head alone. We'd like to merge #432 right after train 33 lands, so its flips (it changes single-pick answers in every language) are measured and attributed on their own and not mixed in with train 33's. We'll handle the main-merge into your branch once train 33 is in, unless you'd rather do it.

How it composes with our --path work. Two lanes in flight touch the same seam:

• A backward-hop provider for --path / --impact already avoids a single pick for a multi-definition sink (its next step names the bare name). So --path is unaffected, but --impact on a bare multi-definition name will start from your tower front instead of the lowest id. That's the intended effect, and we'll re-check those rows when that lane rebases onto feat(resolvers): order every multi-definition name answer with one tower; disclose splits in --lsp (RIPWIRE-RUBY C) #432.
• The next planned step is choosing --path endpoints when a name has several definitions, the --path twin of --connect's "pick the definition that joins" scoring. We'll reuse scoreTerminalCandidates with your tower as the tie-break, not add a second ordering.

The textual overlap is small (legend text in compactlegend.h / mcpverbs.h and the byte pins in test/compactlegendcheck.sh), so we expect pin re-derives rather than logic conflicts.

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[mpapis]

Happy to leave the main-merge to you once train 33 lands — no point both of us chasing a moving head. If the pin re-derives in test/compactlegendcheck.sh / legend text turn out to want a hand, say the word and I'll push the re-pin commit the same day. Good to hear the tower composes with the --path endpoint work; reusing scoreTerminalCandidates rather than a second ordering is what the query-time-only carve-out was for.

[joyful-ii-V-I]

One more note, @mpapis: this is really awesome, and very timely. It's super helpful for what we're working on right now. It lines up directly with our backward-hop work for --path / --impact: with a definite, kind-aware pick for every multi-definition name, those traces can follow the right definition across files, not a lowest-id guess. Together they should give better answers to a lot of everyday code questions ("who reaches this?", "how does A get to B?") in one call. That replaces much of the searching and grepping an agent or a human would otherwise do. Thank you!

[joyful-ii-V-I]

Thanks again @mpapis. Train 33 has landed, so we merged main into your branch and finished the review. One order for every multi-definition name, plus one disclosure sentence, is a real improvement. The red-first arms made the review quick.

What we pushed to your branch (maintainerCanModify):

• 467bbadc merges main (train 33). The conflicts were textual: src/model.h keeps your kKindSpecificityTable beside main's scopeLastSegment, and src/verbs_navigate.h keeps main's safe-delete legend with your tower-front comment. resolveFocus now runs in this order: your tower, then train 33's code-first rotate (the first code match in tower order goes first), then your C/C++ bodied-same-scope scan.
• f5d18ae1 fixes two things, each red on the unfixed merge:
  • A constructor outranked its own class. A constructor is a Method, the top rung, so for a bare class name --lego=Shape answered about public Shape() {}. It printed implementors="0" for a Java/C# class with a subclass, and the same happened for C++ Widget::Widget() when the header sorts first. --around/--connect also focused the constructor. Now a Method whose scope ends in its own name, or that sits inside a same-named type in the match set, ranks just below the type kinds. A method named after an unrelated type keeps its rung (near-miss arm). lspcheck arm (24).
  • The split sentence over-claimed. A C prototype next to its body printed "the resolver splits over them", but the graph binds the call to the body alone (no amb=). The sentence now says "a call may bind to any one of them". Arm (25); arm (19) pins the new text.
• 97d0b6d3 adds the changelog.d/432-name-tower.md fragment, credited to you.
• d9fe1e77 adds arm (26). We mutated the comparator to put the language tier before the kind tier, and every tower gate stayed green: the collision trees are single-language. The new arm uses a Ruby method, a Python class and a Ruby attr. Same commit: WORK is now pwd -P, so arm (21)'s URI pins hold on macOS (/var vs /private/var).
• c1a99732 re-pins test/printf_parity.manifest for your new --around / --safe-delete legend text. Only those two rows moved.

Measured effect. On our 163 stored benchmark calls, 3 answers changed bytes. Two are reorders only (same definitions, same rows: --impact=match on hono, --callers=Get on nfpm). The third is the safe-delete legend wording. No single pick changed. In a census of every multi-row name in tmux (1,990 names), --around moved on 7. Six are C struct X vs function X(), where the tower now picks the struct. One is getopt, which moves from the compat macro to the real function.

On the CodeRabbit note (bodyless class yielding to a same-scope function): we could not reproduce it. A C++ forward declaration class Engine; carries sc="Engine", so the same-scope scan never reaches the free Engine(), and C struct Foo; is not indexed. No change.

One question for you, no need to block on it. The tower is kind-first for every verb. So --around=args_parse in tmux now answers the struct rather than the function, and a Go getter func (s *Server) Config() Config outranks type Config struct for --around=Config. Would you rather have the single-pick verbs choose by role (call verbs prefer a callable, --lego prefers a type) before the tower, or keep one order and rely on defs=? Either is fine with us. We'd do it as a follow-up.

From our side this is ready to merge once the owner pushes these commits and CI is green.

[joyful-ii-V-I]

@mpapis, a quick update on why CI is red on c1a99732, and why we're holding the merge.

Apart from the known showcase capture refresh, two gates fail, and both are --lego picks on a same-kind tie:

• test/a9disclosurecheck.sh §A9.4 runs --lego=Shape on the repo root, where 16 definitions share the name. With the tower it answers test/elixirresolvefix/lib/shape.ex, which has methods="0" and the not-extracted caveat, instead of the C++ Shape whose contract is extracted. So the <m> rows disappear.
• test/kotlincheck.sh (split and flat layouts) runs --lego=Marker on a tree with a Kotlin interface Marker and a Java one. It now answers the Java interface, so the Kotlin implementor arm reads the wrong type.

Main passes both. They fail the same way on our first merge of main into your branch, before any of our fixes, so they come from the tie-break order, not from the constructor change. When two definitions share a kind, the tower orders them by the leading symbol's language and then by id. That is deterministic, but for --lego it can now land on a type with no extracted contract.

This is the role question from our last comment, now with gate evidence. Our leaning is a small tie-break under the kind rank: for --lego, prefer a definition whose contract is extracted (more methods first), then keep your language and id order. Both gates would turn green and the tower's order would stay intact. Would you like to take that, or should we push it to your branch as before? We'll be back on this in a few days. Train 34 is landing first, so expect one more merge of main into the branch.

Thanks again for the tower.

[mpapis]

Thanks for the deep dive and the fair landing plan — answers to both your questions, plus a design direction this investigation shook out.

Take the tie-break. Please push the lego methods-first change as you proposed — it's a view-local preference inside a kind rank, it fixes both gates, and re-deriving it here would just burn a CI cycle. Same for train 34's merge; no need to wait on me for either.

Why the gates broke, precisely (reproduced both on c1a99732 before your fixes landed): A9.4 isn't the constructor change and isn't even primarily my language tier — the Interface rung (4, inherited from the dedup ladder) puts the Elixir module and three Rust traits above every C++ Class before language gets a vote; then the reference-language tier picks which interface by (top rank, lowest id) — a path-alphabet accident elects a language that then dominates the set it was chosen from. That circularity is my design flaw, not the tower's premise, and your diagnosis "comes from the tie-break order" is exactly right. Main passing was accident-of-id, which is the thing #432 exists to abolish — so these failures are the contract working.

Role question: single order + defs= for this PR, please — with one amendment worth extracting now: the language tier as written should become anchor-ordered clusters — (anchor cluster, rank, id) where clusters are langCompatible's own equivalence classes ({C,C++,ObjC}, {JVM}, self). The codebase already enforces precisely this for edges (keepOwnJvmLanguageCandidates: leave home only when home defines no candidate) — the display lane contradicting it is the seam my tower widened, and it's why kotlincheck's lego answer and kotlincheck's edge policy disagreed on the same name in the same commit. Anchoring the display to query context (the LSP already receives languageId and doesn't read it; file:name/@FILE:LINE carry an anchor; corpus-dominant as last resort, disclosed as reflang=) makes Shape=C++ here and Marker=Kotlin there, dissolves the circular tier, and would have turned both your gates green on its own. Your methods-first tie-break composes with that unchanged (it lives inside a cluster), so nothing you're pushing now is thrown away.

I'm already working on it on a separate branch based off this one — say the word if you see it going the wrong direction and I'll weigh it seriously; otherwise expect a PR soon.

Also: thank you for the constructor demotion and the sentence correction — both were right, the Widget::Widget() analysis read better than my own, and arm (26)'s mutation test is the kind of gate work this campaign should have been doing from day one.

[mpapis]

Small amendment to my note above, since the design sharpened under review of itself: the ordering is not "(anchor cluster, rank, id)" — that collapsed two tiers into one, and the JVM case breaks under it: Java and Kotlin share a partition, so a same-rung tie falls back to path order, the very accident we are trying to kill. The rule is language-first: exact matching language → its edge-family → the kind ladder → foreign languages last, where levels decide within a language, never across languages. "Family" is just langCompatible's existing partition ({C,C++,ObjC}, {Java,Kotlin}), borrowed because the edge layer already treats C as C++'s world — a middle ground, not the headline. Everything else in the note above stands.

[joyful-ii-V-I]

@mpapis, thanks for taking the tie-break. It's pushed to your branch now.

We merged train 34 into the branch and pushed the --lego tie-break, building on your diagnosis that the failures came from the tie-break order rather than from the tower itself. One wrinkle shaped the change. Neither red gate was a same-kind tie: shape.ex is an interface next to C++ classes, and Kotlin's grammar tags interface Marker as a class. So within --lego only, every type kind shares one rung. On it, a type with at least one implementor comes first, then a type whose method contract we actually read (<m> rows, today only C++/Objective-C), then your tower's kind, language and id order.

The implementor step goes beyond the literal "methods-first" you approved, so please push back if you would rather not have it. We kept it because it is language-neutral and it preserves the trait-over-struct picks your tower gained (nushell FromValue, PluginCommand). It also sits ahead of the contract step, so a lone C++ header can't outrank a Rust trait or TS interface that has implementors (new legocheck arm 15). resolveFocus, --around and --connect are byte-unchanged. Once your exact-language → family → kind ladder → foreign-last order sits above this rung, the contract step becomes a no-op across languages, so your follow-up composes on top without undoing anything here.

New commits on the branch since c1a99732:

• a6a3afe6 merge of main (train 34)
• 0cd08b67 lego: read the tower by role on one type rung
• e59e5d80 lego: implementors outrank the extracted contract