diff --git a/agent-queue/agent-queue.sh b/agent-queue/agent-queue.sh
index ce34934..8df7994 100755
--- a/agent-queue/agent-queue.sh
+++ b/agent-queue/agent-queue.sh
@@ -602,12 +602,15 @@ scope_check() {
 # frontmatter-STRIPPED body file, so a body starting with '--' is never
 # misparsed as a CLI option.
 build_agent_cmd() {
-  local engine=$1 pf=$2 yolo=$3
+  local engine=$1 pf=$2 yolo=$3 exportpath=${4:-}
   AGENT_CMD=(); AGENT_STDIN=""
   case "$engine" in
     devin)
       AGENT_CMD=( "$DEVIN_BIN" -p --prompt-file "$pf" )
       [[ "$yolo" == "true" ]] && AGENT_CMD+=( --permission-mode dangerous )
+      # Export the conversation (ATIF) so parse_usage can read per-step token
+      # metrics — Devin does not expose usage in its stdout/local log otherwise.
+      [[ -n "$exportpath" ]] && AGENT_CMD+=( --export "$exportpath" )
       ;;
     claude)
       AGENT_CMD=( "$CLAUDE_BIN" -p )
@@ -708,7 +711,10 @@ run_worker() {
       echo "profile: injected persona overlay from '$prof'" >> "$logf"
     fi
   fi
-  build_agent_cmd "$engine" "$bodyf" "$yolo"
+  # Devin conversation export path (derived from the log path so parse_usage can
+  # find it). Harmless for other engines (they ignore the 4th arg).
+  local devin_export="${logf%.log}.devin-export.json"
+  build_agent_cmd "$engine" "$bodyf" "$yolo" "$devin_export"
 
   # ── WIP checkpoint setup (§25.2): on a git cwd, create/checkout aq/wip/<job>
   # so partial work survives a crash; a trap guarantees a checkpoint on EVERY
@@ -1084,7 +1090,24 @@ parse_usage() {
       [[ -n "$ti" ]] && echo "tokens_in=$ti"
       [[ -n "$to" ]] && echo "tokens_out=$to"
       ;;
-    devin)   : ;;  # TODO: Devin session metrics are exposed via API, not the local log.
+    devin)
+      # Devin exposes usage in its ATIF conversation export (--export), not stdout.
+      # build_agent_cmd writes it next to the log; sum per-step token metrics.
+      local exp="${log%.log}.devin-export.json"
+      if [[ -f "$exp" ]]; then
+        local dti dto dtc dmodel
+        dti=$(grep -oE '"input_tokens"[[:space:]]*:[[:space:]]*[0-9]+' "$exp" | grep -oE '[0-9]+' | awk '{s+=$1} END{print s+0}')
+        dto=$(grep -oE '"output_tokens"[[:space:]]*:[[:space:]]*[0-9]+' "$exp" | grep -oE '[0-9]+' | awk '{s+=$1} END{print s+0}')
+        dtc=$(grep -oE '"cache_read_tokens"[[:space:]]*:[[:space:]]*[0-9]+' "$exp" | grep -oE '[0-9]+' | awk '{s+=$1} END{print s+0}')
+        dmodel=$(grep -oE '"model_name"[[:space:]]*:[[:space:]]*"[^"]+"' "$exp" | head -1 | sed -E 's/.*:[[:space:]]*"([^"]+)".*/\1/')
+        [[ -n "$dmodel" ]] && echo "model=$dmodel"
+        [[ "${dti:-0}" -gt 0 ]] && echo "tokens_in=$dti"
+        [[ "${dto:-0}" -gt 0 ]] && echo "tokens_out=$dto"
+        [[ "${dtc:-0}" -gt 0 ]] && echo "tokens_cached=$dtc"
+        # NOTE: Devin's export carries token counts but not USD cost; cost_usd is
+        # left unset (the dashboard shows tokens + model; cost stays blank).
+      fi
+      ;;
     copilot) : ;;  # TODO: GitHub Copilot CLI usage format not yet documented here.
   esac
   return 0
diff --git a/agent-queue/selftest.sh b/agent-queue/selftest.sh
index 11b9da8..6a605cb 100755
--- a/agent-queue/selftest.sh
+++ b/agent-queue/selftest.sh
@@ -459,6 +459,35 @@ else
   printf '%s\n' "$out" >&2; fail "insights aggregate rollup missing/incorrect"
 fi
 
+# 18b. devin usage: parse_usage sums per-step token metrics from the --export ATIF
+# conversation (Devin exposes usage there, not in stdout). A fake devin engine
+# writes the export to the --export path build_agent_cmd passes.
+devexportstub="$tmp/devin-export-engine"
+cat > "$devexportstub" <<'STUBEOF'
+#!/usr/bin/env bash
+exp=""; while [ $# -gt 0 ]; do [ "$1" = "--export" ] && exp="$2"; shift; done
+if [ -n "$exp" ]; then
+  cat > "$exp" <<'JSON'
+{"schema_version":"ATIF-v1.4","agent":{"model_name":"Claude Opus 4.8"},"steps":[
+{"metadata":{"metrics":{"input_tokens":1200,"output_tokens":300,"cache_read_tokens":900}}},
+{"metadata":{"metrics":{"input_tokens":800,"output_tokens":200,"cache_read_tokens":100}}}]}
+JSON
+fi
+echo "done"; exit 0
+STUBEOF
+chmod +x "$devexportstub"
+"$AQ" init >/dev/null
+printf '%s\n' '---' 'engine: devin' "cwd: $work" 'yolo: true' '---' '' '# devin usage task' \
+  > "$AGENT_QUEUE_ROOT/inbox/devusage.md"
+DEVIN_BIN="$devexportstub" "$AQ" run --once >/dev/null 2>&1
+dm="$AGENT_QUEUE_ROOT/.state/devusage.meta"
+if [ "$(metaval "$dm" tokens_in)" = "2000" ] && [ "$(metaval "$dm" tokens_out)" = "500" ] \
+   && [ "$(metaval "$dm" tokens_cached)" = "1000" ] && [ "$(metaval "$dm" model)" = "Claude Opus 4.8" ]; then
+  pass "parse_usage devin: sums per-step tokens + model from --export ATIF"
+else
+  fail "devin export parse wrong (in=$(metaval "$dm" tokens_in) out=$(metaval "$dm" tokens_out) cached=$(metaval "$dm" tokens_cached) model=$(metaval "$dm" model))"
+fi
+
 # ─────────────────────────────────────────────────────────────────────
 # Phase 1 — Slice 2 cases (profiles + deps/DAG, single host).
 # Uses a temp profile catalog (AGENT_QUEUE_PROFILES) + temp git repos.