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THIS UNIT SUPERSEDES #272 — it is the SAME module and the same work, re-filed to be SELF-CONTAINED. The superseded unit named its source only as a `git cat-file` command against the forge's bare repos, which the sandboxed pair_loop worker that executes these tickets cannot run, so it could not be done as filed (#346; #259 is the proof). A ticket body is permanent in SQL (tg_tickets_immutable_identity, migrations/0029_ticket_authorization .sql:111-117), so that body could not be repaired — this ticket carries the fix instead, and the original is halted by a stop ticket rather than erased. Do the work HERE. Rewrite ONE unique forge module as entirely new, behavior-preserving, installable, control-config'd Python, per the FORGE-wide refactor standard #200 (#std). This ticket covers ONE module — the one identified below — and nothing else. It was filed against the module's DEDUPLICATED identity, so if that module was copy-pasted across the forge, every copy is covered by this single ticket. MODULE KEY : forge-rw:f3df615229b4c9f7 (the ticketer's idempotency marker — it lives in this ticket's TITLE. Do not edit the title, or the module will be re-filed as a duplicate.) IDENTITY : AST-NORMALIZED — codebean's `_ast_norm` (#183), i.e. ast.dump(ast.parse(ast.unparse(ast.parse(src)))). Copies of this module that differ only in comments, blank lines, quoting or spacing carry the SAME module-sha and are covered by THIS ticket. A differing docstring is real content, so a module whose docstring differs is a DIFFERENT module with its own ticket. SIZE : 201 bytes EXTENSION : .py CANONICAL SOURCE (the location this ticket is named for): repo : artifact_tree_gen path : fib.py ref : HEAD (as recorded when this module was first filed) blob : 80579f1291ad28cd37655ff1ad90814abc025376 (git blob sha1) REFERENCE ONLY — you do NOT need this command. This module's bytes are embedded COMPLETE in THE ORIGINAL SOURCE block below, and that is what the rewrite is based on. For a reader who does have forge access: git --git-dir=/Users/stevenpeterson/code/installed/jazz-project/config/forge/remotes/artifact_tree_gen.git cat-file blob 80579f1291ad28cd37655ff1ad90814abc025376 THE SAME MODULE ALSO LIVES AT THESE FORGE TIPS: none — this module is unique to artifact_tree_gen among the repos scanned so far. HISTORICAL OCCURRENCES of this exact blob — every OTHER DISTINCT {repo, path} the omni-git index (`occ`, joined on the git blob sha1) records this byte-identical file at, with the index's own `ts` for the first row of each. Any place this run enumerated LIVE is listed under the forge tips above, not here. Context for the rewrite, not extra work: test_project__new_repo__packages__codebean_mcp__prototype__artifact_tree_gen:fib.py [occ.ts 20260702T181421Z] THE ORIGINAL SOURCE, EMBEDDED — YOU NEED NO FORGE ACCESS TO DO THIS TICKET. The module's own bytes are reproduced below, inside this ticket. THEY are the authoritative copy and the behavior-preserving basis: rewrite from them. The `git --git-dir=... cat-file blob` command under CANONICAL SOURCE above is kept only as a REFERENCE for a reader who happens to have forge access — running it is NOT part of this ticket. (Why the bytes are here at all: the pair_loop worker that executes this ticket is sandboxed to the ticket's own congruency worktree and cannot read the forge's bare repos. Ticket #346 is the fix that put them on the ticket.) The block BEGINS at the line ===ORIGINAL SOURCE (verbatim, the behavior-preserving basis)=== and ENDS at the first line ===END SOURCE=== Everything strictly between those two lines is the module — 201 byte(s), byte for byte, with no re-indentation, no re-wrapping and nothing elided. ===ORIGINAL SOURCE (verbatim, the behavior-preserving basis)=== from code_pipeline import trace as debug_decorator @debug_decorator def fib(n): if n <= 1: return n a, b = (0, 1) for _ in range(2, n + 1): a, b = (b, a + b) return b ===END SOURCE=== THE CALLABLE SURFACE — every callable in the original, lowered with codebean's `lower_node` (#183). The rewrite must present THIS surface (same names, same parameters, same defaults) so callers of the original keep working: fib(n) CAPTURED BEHAVIORAL EXEMPLARS — real (input, output) pairs mined from THIS module with criteria_miner (#200's "verified, not asserted"), running the ORIGINAL as the oracle. THE REWRITE MUST REPRODUCE EVERY PAIR BELOW, exactly: fib(n) — 6 exemplar(s) captured: fib(-1) == -1 fib(0) == 0 fib(1) == 1 fib(2) == 1 fib(3) == 2 fib(True) == True HONEST LIMIT (criteria_miner's own): these cover the SAMPLED inputs, probed around the function's own branch constants. They are a strong refactor-drift net, NOT a proof of total equivalence — so treat them as the FLOOR of this ticket's equivalence evidence and add the edge cases they miss (see ACCEPTANCE). THE STANDARD — #200's four requirements, which this ticket exists to enforce. All four are the standard's own words; none is optional: 1. BEHAVIOR-PRESERVING, VERIFIED NOT ASSERTED — the deliverable is ENTIRELY NEW source code (rewritten, not copied). It must reproduce the ORIGINAL's behavior, and the proof is the exemplars above (captured via codebean lower_* #183 + criteria_miner IO-exemplars, exactly as #200 specifies). 2. A PYTHON MODULE — regardless of the source language. This module's source is `.py`; the rewrite is Python either way. 3. INSTALLABLE — a proper package: pyproject.toml, `pip install -e .` works, console entry points where applicable. 4. CONTROL-CONFIG'D — NO hardcoded paths or params. A JSON/registry config object drives it (the install.json / registry.json idiom of this repo), and per note-for-claude a tool that cannot see its config THROWS rather than guessing a default. ACCEPTANCE (#200's, per rewrite ticket) — this ticket settles when ALL of: a. the new source reproduces every captured exemplar above, plus the edge cases you add for what sampling cannot reach (paste the runs as evidence); b. it presents the callable surface above, so existing callers keep working; c. `pip install -e .` installs it clean from its own pyproject.toml; d. it runs off a config object with ZERO hardcoded settings, and throws without one. Kind is `build` (a pair: coder + adversarial tester). This ticket hangs off #200 by a `spawned` edge, so a stop ticket aimed at #200 brakes every rewrite in this programme. Filed mechanically by checkouts/current/congruency/tools/forge_refactor_ticketer.py under ticket #201, from the forge bare repos at /Users/stevenpeterson/code/installed/jazz-project/config/forge/remotes. Its original source is embedded above (#346), so this ticket is complete on its own.

— browse congruency source (forge-parked tree)

— #272 Rewrite artifact_tree_gen:fib.py as behavior-preserving, installable, control-config'd Python [forge-rw:f3df615229b4c9f7] (supersedes · REQUESTED)