docs: raise the root AGENTS.md ceiling for the standing orders

The root file passes the 1,960-word ceiling on the branch alone but exceeds it
once master's newest standing order is merged in, which is what `node 24 /
static` reports. Raise the ceiling to 2,080 and update the documented target in
the same change, per the "a too-low ceiling is a budget bug" rule.

docs/AGENTS.md

@@ -56,7 +56,7 @@ When the gate goes red:
 2. **Condense** content that belongs here but can be shorter.
 3. **Raise** the ceiling only when the words need the space; justify the manifest diff in the PR. A too-low ceiling is a budget bug.
 
-Ceilings are guardrails, not reduction targets. At or below target, retain at least 5% headroom; above target, freeze the ceiling until relocation or condensation brings the document under target. Lower a ceiling only when the document still has room. Targets: root `AGENTS.md` ≤ 1,960; `architecture.md` ≤ 2,400; subtree `AGENTS.md` ≤ 600, except `packages/AGENTS.md` ≤ 810 and this file ≤ 1,430; `packages/README.md` ≤ 994; plus `cordis-primer.md` 600, `testing.md` 1,300, `examples/AGENTS.md` 310. Review governs unbudgeted tiers.
+Ceilings are guardrails, not reduction targets. At or below target, retain at least 5% headroom; above target, freeze the ceiling until relocation or condensation brings the document under target. Lower a ceiling only when the document still has room. Targets: root `AGENTS.md` ≤ 2,080; `architecture.md` ≤ 2,400; subtree `AGENTS.md` ≤ 600, except `packages/AGENTS.md` ≤ 810 and this file ≤ 1,430; `packages/README.md` ≤ 994; plus `cordis-primer.md` 600, `testing.md` 1,300, `examples/AGENTS.md` 310. Review governs unbudgeted tiers.
 
 ## The slop checklist
 

scripts/doc-budgets.manifest.json

@@ -1,5 +1,5 @@
 {
-  "AGENTS.md": 1960,
+  "AGENTS.md": 2080,
   "docs/AGENTS.md": 1430,
   "docs/architecture.md": 2410,
   "docs/cordis-primer.md": 600,