source-pipeline-is-end-to-end-fail-safe
IN derived (depth 4)
The complete source integrity pipeline from path resolution through hash computation to staleness detection is end-to-end fail-safe: convention-based resolution returns None on missing files rather than raising exceptions, collision-resistant SHA-256 hashing backfills additively without overwriting, and staleness detection catches all drift with CI-ready exit codes — no stage in the pipeline raises exceptions on adverse conditions, and each stage's output gracefully feeds the next.
Summary
The entire chain for checking whether source files have changed — finding the file, computing its hash, and detecting staleness — is designed so that no step can crash or corrupt data on unexpected input. If a file is missing, the system quietly returns nothing instead of blowing up; hashing adds new entries without overwriting old ones; and staleness checks produce clear pass/fail exit codes suitable for CI. Each stage degrades gracefully and hands clean output to the next, so the pipeline never halts partway through on an error condition.
Justifications
SL — Adding the resolution stage to the existing hashing-through-detection pipeline completes the end-to-end fail-safe property from first path lookup to final CI gate
Antecedents (all must be IN):
- source-resolution-is-convention-based-and-fail-safe — Source path resolution follows a convention-based repo-alias/relative-path format and returns None on missing files rather than raising exceptions, providing safe path resolution for the staleness checking pipeline.
- source-integrity-spans-hashing-through-detection — Source integrity forms a complete end-to-end pipeline with no gap between measurement and verification: collision-resistant SHA-256 hashing with additive backfill computes integrity markers without overwriting existing hashes, while comprehensive staleness detection with CI gating and nonzero exit codes consumes those markers to catch all source drift.
Dependents
These beliefs depend on this one:
- source-integrity-is-fail-safe-deterministic-and-grounded — The source integrity pipeline achieves triple assurance from two independent chains: fail-safe operation (convention-based path resolution returning None on missing files, collision-resistant SHA-256 hashing with additive backfill, comprehensive staleness detection) combined with architectural determinism (grounded within clean layer boundaries ensuring predictable state trajectories).
- source-lifecycle-is-fail-safe-and-gapless — The end-to-end fail-safe source integrity pipeline — from convention-based path resolution through collision-resistant SHA-256 hashing to comprehensive drift detection — feeds directly into gapless lifecycle management, ensuring every source material change on disk is detected, surfaced, and managed through the full belief lifecycle without gaps.