docs(agents): bound context and retain corrections

AGENTS.md

@@ -21,3 +21,16 @@ updates, prose edits, and release housekeeping in the normal repository
 workflow unless their risk warrants a written specification. Keep completed
 feature directories under `specs/` as decision history; do not backfill them for
 finished work.
+
+## Context and handoffs
+
+- Locate source with targeted searches before reading. For exploratory reads of
+  files over 350 lines, select relevant ranges. Read required guidance and actual
+  source before edits or correctness claims; summaries do not replace them.
+- When delegation is permitted, give each worker one question or concrete output,
+  allowed paths, and a check. Return findings with source locations, changed paths,
+  and verification gaps. Keep final review with the coordinating agent.
+- Record durable user corrections in the [project guide](.specify/memory/project-guide.md)
+  or owning contract with scope, reason, and evidence. Replace superseded advice;
+  read relevant corrections before reusing assumptions. Keep temporary progress
+  in task notes and preserve existing authority rules.