Hunt R-6F088D: zeta23ext root load, Retention.Aconst / c2 collisions across arms

Run bc87fba6-95d1-4ce0-a9ef-c7e364c95bcb, branch hunt/r-6f088d-bc87fba6, budget 30 minutes, no operator supervision. Case log entry: Hunt #49 (Hunt #46 was assigned in the brief but was already occupied on disk by r_b9552d/).

The question

zeta23ext root could not load: Retention.Aconst / c2 defined in three arms (fixed by scoping; duplication remains). Settle the mechanism, verify the scope of collision and duplication across the arms, and determine whether the root module can load under Lean 4.

Scope

Writes confined to hunts/r_6f088d/, this directory, and one case log entry in hunts/README.md.

id: r_6f088d
question: What caused the root module load failure in zeta23ext for Retention.Aconst and c2 across arms, how was it scoped, and what symbol duplication remains?
frontier: Zeta23Ext.lean imports multiple arms (PairEnergy, EForm, EForm2, EForm3, TruncEst) developed across batches 2-6; 17 symbol collisions exist across modules under namespace Retention
proposed_attack: parse every Lean source file, map the declaration and import DAG, test pairwise module collisions under the Lean 4 compiler, and analyze mathematical equivalence of duplicate definitions
dead_routes:
  - importing colliding arms into a single Lean module without distinct namespace qualification
  - treating syntax differences in equivalent mathematical definitions as separate concepts
required_oracles:
  - the Lean 4 compiler error output on colliding module imports
  - exact AST and regex parsing of declaration namespaces across all 64 Lean files in the package
kill_conditions:
  - the Lean toolchain is unavailable or unexecutable
  - the 30 minute budget is exhausted
  - the symbol collision mechanism cannot be demonstrated mechanically
agents_may:
  - parse and analyze Lean source files
  - compile isolated test modules under Lean
  - produce data artifacts and documentation
agents_may_not:
  - edit lean files outside hunts/r_6f088d/
  - assign epistemic status to their own outputs
  - claim the reserved certification word

Standing rules

Nothing here is evidence for or against RH (docs/08). Nothing in hunts/ is a result until it has been through the battery or the funnel.