Clause documentation

Short reference notes for the current implementation. Each file states behavior and limits that exist today; plans and step history live in .agents/.

Topic	Document
Preprocessing (`epp` behavior, includes, macros, features)	preprocessor.md
Parsing, AST ownership, syntax limits	parser.md
TOML projects and target selection	projects.md
Compiler CLI, artifacts, LLVM SDK, example	compile.md
Executable entry, arguments, exit status, output streams, linking	executables.md
Semantic analysis, types, inference, bindings	semantic.md
Type specialization policy	specialization.md
Generated-code ABI: terms, symbols, registration, failures, roots	abi.md
Patterns, clauses and body matches	patterns.md
Guards and the guard BIF catalog	guards.md
Term representations (atoms, numbers, containers, maps, bits, records) and printing	terms.md
Native, qualified and anonymous records (OTP 29)	native-records.md
Function values: `fun F/A`, `fun M:F/A`, calls of funs	funs.md
Production builtins: catalog, bridge calls, builtin funs, registration	builtins.md
Library modules (`lists`, `maps` subsets) compiled with programs	library.md
Console output: `io:format/1,2`, `io:put_chars/1`, `~p` layout	io.md
Runtime lifecycle, memory, standard output, code server, scheduler bookkeeping	runtime.md
Processes: scheduler workers, time slices, `spawn/1,3`, `is_process_alive/1`, links, exit signals, monitors, registered names	processes.md
Ports: identity, port table, drivers, data modes, the I/O thread, standard I/O, files and sockets (plan step 57A decision)	ports.md
Process heap contract: word layout, areas, admission, roots, collection	runtime-heap.md
Execution model decision: frames, calls, tail calls, yield, exceptions	execution-model.md
Deferred-feature (`notimpl`) reporting	features.md
OTP source reference pin and refresh procedure	otp-reference.md
Known behavior differences from Erlang/OTP	differences.md
Validation baseline, test modes, platform gaps, history	validation.md

Older per-step validation records and evidence JSON were condensed into validation history; full originals remain in Git history (last present at commit 2777c98).