Fission-AI/OpenSpec · error · Error

Spec inputs for '${p.update.id}' changed before archive coul

Error message

Spec inputs for '${p.update.id}' changed before archive could write them.

What it means

Error "Spec inputs for '${p.update.id}' changed before archive could write them." thrown in Fission-AI/OpenSpec.

Source

Thrown at src/core/archive.ts:1748

            const writeTotals = { added: 0, modified: 0, removed: 0, renamed: 0 };
            let wroteAny = false;
          for (const p of prepared) {
            // Deletions are deferred to the loop below.
            if (p.outcome !== 'write') continue;
            const { added, modified, removed, renamed } = p.counts;
            if (added + modified + removed + renamed === 0) {
              // Every operation was already synced: rewriting the file would
              // only churn normalization differences into it.
              continue;
            }
            await writeUpdatedSpec(p.update, p.rebuilt, p.counts, {
              silent: json,
              beforeMutate: async () => {
                if (
                  (await fingerprintSpecInputs(p.update)) !==
                  `${p.sourceFingerprint}\n${p.targetFingerprint}`
                ) {
                  throw new Error(
                    `Spec inputs for '${p.update.id}' changed before archive could write them.`
                  );
                }
                mutationAttempts.add(p.update.target);
              },
              // Cross-root paths must be absolute when a store is selected.
              ...(isStoreSelectedRoot(root) ? { displayPath: p.update.target } : {}),
            });
            wroteAny = true;
            writeTotals.added += added;
            writeTotals.modified += modified;
            writeTotals.removed += removed;
            writeTotals.renamed += renamed;
          }

          // Retirements run only after every write has succeeded. If any
          // later mutation fails, the snapshots below restore every target.
          for (const p of prepared) {

View on GitHub (pinned to 6926ccb18a)

When it happens

Trigger: Thrown at src/core/archive.ts:1748 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Fission-AI/OpenSpec@6926ccb18a (2026-08-25). Data as JSON: /api/errors/e898914b23cbd4e4. Report an issue: GitHub.