REPL print-value uses buffer-based output: write-value/v buf appends formatted strings via buffer/push-string, then print-value creates buffer, builds string, and does a single (print (string buf)). This prevents Janet C runtime from interleaving native <tuple 0x...> output between prin statements in jpm build executables. Cond catch-all must use true clause: Janet's cond treats plain expressions as tests, so (push-str buf (string v)) at end of cond would be evaluated as a test — need true before it.
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Post-Phase 13: 316/317 passing, 1 fail (pre-existing deftype in SCI lang.cljc, deferred to Phase 15). 8,000+ lines across ~25 source/test files. Key sources: compiler.janet (848), evaluator.janet (877), core.janet (1387), types.janet (441), reader.janet (500), phm.janet (199). 9 .clj stdlib modules (clojure/string.clj, set.clj, walk.clj, zip.clj, edn.clj, java_io.clj; jolt/interop.clj, shell.clj, http.clj). SCI stub file at src/jolt/clojure/sci/lang_stubs.clj provides 5 protocols + 3 deftypes. ~25 test files with 850+ assertions. CLJS-ported tests: 6 files, 27 sections, ~120 assertions. All builds/runs via `jpm test`.
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Protocol system: Type registry in context env (:type-registry) maps type-tag→proto-name→method-name→fn. Three dispatch special forms: protocol-dispatch (resolves method via registry or reified methods), register-method (stores impl in registry), make-reified (creates anonymous object with :jolt/protocol-methods). fn* forms emitted by extend-type/extend-protocol MUST be @[...] (array) for eval-list dispatch. Protocols are maps with :jolt/type :jolt/protocol and :methods map.