diff --git a/.machine_readable/agent_instructions/README.adoc b/.machine_readable/bot_directives/README.adoc
similarity index 95%
rename from .machine_readable/agent_instructions/README.adoc
rename to .machine_readable/bot_directives/README.adoc
index 1cc7487e..a077b116 100644
--- a/.machine_readable/agent_instructions/README.adoc
+++ b/.machine_readable/bot_directives/README.adoc
@@ -32,7 +32,7 @@ Methodology-aware configuration for AI agents. Read by any AI agent
 == Relationship to Other Files
 
 * `AGENTIC.a2ml` says WHAT agents can do (permissions, gating)
-* `agent_instructions/` says HOW agents should work (methodology)
+* `bot_directives/` says HOW agents should work (methodology)
 * `bot_directives/` says what the gitbot-fleet does (fleet-specific)
 * `CLAUDE.md` says how Claude specifically should work (Claude-specific)
 
diff --git a/.machine_readable/agent_instructions/coverage.a2ml b/.machine_readable/bot_directives/coverage.a2ml
similarity index 100%
rename from .machine_readable/agent_instructions/coverage.a2ml
rename to .machine_readable/bot_directives/coverage.a2ml
diff --git a/.machine_readable/agent_instructions/debt.a2ml b/.machine_readable/bot_directives/debt.a2ml
similarity index 100%
rename from .machine_readable/agent_instructions/debt.a2ml
rename to .machine_readable/bot_directives/debt.a2ml
diff --git a/.machine_readable/agent_instructions/methodology.a2ml b/.machine_readable/bot_directives/methodology.a2ml
similarity index 100%
rename from .machine_readable/agent_instructions/methodology.a2ml
rename to .machine_readable/bot_directives/methodology.a2ml
diff --git a/.machine_readable/contractiles/adjust/adjust.k9.ncl b/.machine_readable/contractiles/adjust/adjust.k9.ncl
index 513a6e38..4974ba7f 100644
--- a/.machine_readable/contractiles/adjust/adjust.k9.ncl
+++ b/.machine_readable/contractiles/adjust/adjust.k9.ncl
@@ -86,7 +86,7 @@ let base    = import "../_base.ncl" in
       { kind = 'verisimdb, table = "contractile_executions",
         schema = "contractile_execution_v1",
         aux_tables = [ "adjust_drift_history" ] },
-      { kind = 'drift_log, path = ".machine_readable/6a2/DRIFT.a2ml",
+      { kind = 'drift_log, path = ".machine_readable/descriptiles/DRIFT.a2ml",
         append_only = true },
     ],
 
@@ -141,7 +141,7 @@ let base    = import "../_base.ncl" in
             signature_required = true,
           },
         ],
-        signed_record_destination = ".machine_readable/6a2/ratification-<session-id>.a2ml",
+        signed_record_destination = ".machine_readable/descriptiles/ratification-<session-id>.a2ml",
         must_precede_work = true,
       },
 
diff --git a/.machine_readable/contractiles/bust/bust.k9.ncl b/.machine_readable/contractiles/bust/bust.k9.ncl
index 3bd9674b..0740076b 100644
--- a/.machine_readable/contractiles/bust/bust.k9.ncl
+++ b/.machine_readable/contractiles/bust/bust.k9.ncl
@@ -88,7 +88,7 @@ let base    = import "../_base.ncl" in
       { kind = 'verisimdb, table = "contractile_executions",
         schema = "contractile_execution_v1",
         aux_tables = [ "bust_recovery_times" ] },
-      { kind = 'failure_log, path = ".machine_readable/6a2/FAILURES.a2ml",
+      { kind = 'failure_log, path = ".machine_readable/descriptiles/FAILURES.a2ml",
         append_only = true },
     ],
 
@@ -142,7 +142,7 @@ let base    = import "../_base.ncl" in
             signature_required = true,
           },
         ],
-        signed_record_destination = ".machine_readable/6a2/ratification-<session-id>.a2ml",
+        signed_record_destination = ".machine_readable/descriptiles/ratification-<session-id>.a2ml",
         must_precede_work = true,
       },
 
diff --git a/.machine_readable/6a2/AGENTIC.a2ml b/.machine_readable/descriptiles/AGENTIC.a2ml
similarity index 100%
rename from .machine_readable/6a2/AGENTIC.a2ml
rename to .machine_readable/descriptiles/AGENTIC.a2ml
diff --git a/.machine_readable/6a2/ANCHOR.a2ml b/.machine_readable/descriptiles/ANCHOR.a2ml
similarity index 100%
rename from .machine_readable/6a2/ANCHOR.a2ml
rename to .machine_readable/descriptiles/ANCHOR.a2ml
diff --git a/.machine_readable/6a2/ECOSYSTEM.a2ml b/.machine_readable/descriptiles/ECOSYSTEM.a2ml
similarity index 100%
rename from .machine_readable/6a2/ECOSYSTEM.a2ml
rename to .machine_readable/descriptiles/ECOSYSTEM.a2ml
diff --git a/.machine_readable/6a2/META.a2ml b/.machine_readable/descriptiles/META.a2ml
similarity index 100%
rename from .machine_readable/6a2/META.a2ml
rename to .machine_readable/descriptiles/META.a2ml
diff --git a/.machine_readable/6a2/NEUROSYM.a2ml b/.machine_readable/descriptiles/NEUROSYM.a2ml
similarity index 100%
rename from .machine_readable/6a2/NEUROSYM.a2ml
rename to .machine_readable/descriptiles/NEUROSYM.a2ml
diff --git a/.machine_readable/6a2/PLAYBOOK.a2ml b/.machine_readable/descriptiles/PLAYBOOK.a2ml
similarity index 100%
rename from .machine_readable/6a2/PLAYBOOK.a2ml
rename to .machine_readable/descriptiles/PLAYBOOK.a2ml
diff --git a/.machine_readable/6a2/STATE.a2ml b/.machine_readable/descriptiles/STATE.a2ml
similarity index 100%
rename from .machine_readable/6a2/STATE.a2ml
rename to .machine_readable/descriptiles/STATE.a2ml
diff --git a/0-AI-MANIFEST.a2ml b/0-AI-MANIFEST.a2ml
index 5a5d8180..68626985 100644
--- a/0-AI-MANIFEST.a2ml
+++ b/0-AI-MANIFEST.a2ml
@@ -18,7 +18,7 @@ repo = "https://github.com/hyperpolymath/echidna"
 [context-tiers]
 # Tier 0 (always load): This file + .claude/CLAUDE.md — orientation only
 # Tier 1 (load if working on code): README.adoc, EXPLAINME.adoc, Justfile, Cargo.toml
-# Tier 2 (load on demand): .machine_readable/6a2/*.a2ml, docs/
+# Tier 2 (load on demand): .machine_readable/descriptiles/*.a2ml, docs/
 # Tier 3 (never load unless asked): tests/, generated/, proofs/
 #
 # DO NOT READ unless specifically asked:
@@ -32,9 +32,9 @@ repo = "https://github.com/hyperpolymath/echidna"
 
 [canonical-locations]
 state-files = ".machine_readable/"
-state = ".machine_readable/6a2/STATE.a2ml"
-meta = ".machine_readable/6a2/META.a2ml"
-ecosystem = ".machine_readable/6a2/ECOSYSTEM.a2ml"
+state = ".machine_readable/descriptiles/STATE.a2ml"
+meta = ".machine_readable/descriptiles/META.a2ml"
+ecosystem = ".machine_readable/descriptiles/ECOSYSTEM.a2ml"
 anchors = ".machine_readable/anchors/"
 policies = ".machine_readable/policies/"
 contractiles = ".machine_readable/contractiles/"
@@ -95,9 +95,9 @@ invariant-9 = "Zero believe-me in Idris2 ABI (src/abi/)"
 [session-protocol]
 on-enter = [
   "Read this manifest",
-  "Read .machine_readable/6a2/STATE.a2ml for current status",
+  "Read .machine_readable/descriptiles/STATE.a2ml for current status",
   "Read .claude/CLAUDE.md for build commands and conventions",
 ]
 on-exit = [
-  "Update .machine_readable/6a2/STATE.a2ml with progress",
+  "Update .machine_readable/descriptiles/STATE.a2ml with progress",
 ]
diff --git a/scripts/collect-field-signal.sh b/scripts/collect-field-signal.sh
index d388ac91..f229edec 100755
--- a/scripts/collect-field-signal.sh
+++ b/scripts/collect-field-signal.sh
@@ -6,7 +6,7 @@
 set -euo pipefail
 
 REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
-STATE_FILE="${REPO_ROOT}/.machine_readable/6a2/STATE.a2ml"
+STATE_FILE="${REPO_ROOT}/.machine_readable/descriptiles/STATE.a2ml"
 TIMESTAMP=$(date -u +"%Y-%m-%d")
 
 # 1. Cold-start latency from Fly.io logs (requires auth)