FEATURE: TOML Strings

Scope

Support basic and literal strings, multiline delimiters, required escapes, Unicode scalar escapes, newline trimming, line-ending continuation, embedded quotes, preserved whitespace, and prohibited-control validation according to TOML 1.0.0.

Programmatic Acceptance

=== AC strings-valid-suite ===
Intent: The authoritative conformance suite passes every valid string case owned by this feature.

import subprocess

result = subprocess.run( ["sh", "sources/stage_test.sh", "valid/string/**"], capture_output=True, text=True, ) print(result.stdout) print(result.stderr) assert result.returncode == 0 === END AC strings-valid-suite ===

=== AC strings-invalid-suite ===
Intent: The authoritative conformance suite rejects every invalid string case owned by this feature.

import subprocess

result = subprocess.run( ["sh", "sources/stage_test.sh", "invalid/string/**"], capture_output=True, text=True, ) print(result.stdout) print(result.stderr) assert result.returncode == 0 === END AC strings-invalid-suite ===

=== AC strings-bounded-suites ===
Intent: Both string conformance invocations complete successfully as separate executable checks.

import subprocess

patterns = ["valid/string/", "invalid/string/"] for pattern in patterns: result = subprocess.run( ["sh", "sources/stage_test.sh", pattern], capture_output=True, text=True, ) print(result.stdout) print(result.stderr) assert result.returncode == 0 === END AC strings-bounded-suites ===

User Acceptance

• None.

Guardrails

• Basic-string escapes must be decoded only when TOML 1.0.0 permits them.
• Literal strings must preserve backslashes and reject unescaped delimiters.
• Multiline strings must enforce delimiter, trimming, continuation, and control-character rules.
• Invalid UTF-8 and prohibited controls must not be accepted as string content.