Template Tinseltoes

Verified via Docker: images built and all tests passing (57/57). Commands: make -C ./impl/cplusplus-codex-gpt5-1757432341 cli-image; make -C ./impl/cplusplus-codex-gpt5-1757432341 test

All stages complete. 57/57 tests passing. Implemented stage-4 collections (List/Set/Dict) with indexing, built-ins (push, assoc, size, first, rest), collection + operations, and structural equality. Implemented stage-5 functions: closures with lexical scoping by reference, partial application, built-in higher-order functions (map, filter, fold), operator functions as first-class (+,-,*,/), function composition (>>) and threading (|>) semantics, comparisons (>,<,>=,<=) for numerics, and If expression evaluation. Commands to run: make -C ./impl/cplusplus-codex-gpt5-1757432341 test; single stage: make -C ./impl/cplusplus-codex-gpt5-1757432341 test-stage-N; single file: make -C ./impl/cplusplus-codex-gpt5-1757432341 test-file FILE=tests/stage-N/

Stage 3 in-progress: Implemented evaluator runtime in C++. Added Value type, env, built-ins (puts, +, -, *, /); truthiness for && and ||; program prints last non-comment expression; string repr uses raw quotes; decimal printing uses precision(16). Commands: make -C ./impl/cplusplus-codex-gpt5-1757432341 cli-image; make -C ./impl/cplusplus-codex-gpt5-1757432341 test-stage-3

Stage 2 complete: parser+AST added; tests green via make test-stage-1 and test-stage-2.

Developer tooling scaffolded: Dockerfile.build, Dockerfile.cli, .gitignore, and a stage-1 lexer CLI (tokens). Built via: make -C ./impl/cplusplus-codex-gpt5-1757432341 build-image && make -C ./impl/cplusplus-codex-gpt5-1757432341 cli-image

Kickoff: Implement elf-lang in C++ under ./impl/cplusplus-codex-gpt5-1757432341. Initial focus: Dockerized developer tooling setup and CLI skeleton. To resume: make -C ./impl/cplusplus-codex-gpt5-1757432341 build-image && make -C ./impl/cplusplus-codex-gpt5-1757432341 cli-image