diff --git a/format-stream.jq b/format-stream.jq
index 8f68898..26a5851 100644
--- a/format-stream.jq
+++ b/format-stream.jq
@@ -1,37 +1,247 @@
 # Formats claude -p --output-format stream-json events into clean,
 # human-readable lines for a live terminal. Fed raw NDJSON on stdin.
+#
+# Stateful: walks the stream via foreach so tool_result lines can be traced
+# back to the tool_use that produced them (matched by tool_use_id), which is
+# what lets Read/Glob/Grep/Bash results be recognized and condensed below.
 
 def truncate(n):
   if (. | length) > n then .[0:n] + "..." else . end;
 
-def tool_summary:
-  if .name == "Bash" then (.input.command // "" | tostring | truncate(150))
-  else (.input | tostring | truncate(150))
+def strip_ansi:
+  gsub("\\[[0-9;]*[a-zA-Z]"; "");
+
+def strip_cr:
+  gsub("\r"; "");
+
+# git's own core.autocrlf notice - fires on add/commit/checkout for any file
+# with mixed line endings, never actionable, pure noise.
+def strip_git_crlf_warnings:
+  split("\n")
+  | map(select(test("^warning: in the working copy of .*LF will be replaced by CRLF") | not))
+  | join("\n");
+
+# drops everything from the first "diff --git" marker onward - the actual
+# diff is redundant with what the PR itself will show, and a unified diff
+# in the middle of a status/commit summary is pure noise here.
+def strip_git_diff_body:
+  (split("\n")) as $lines |
+  (reduce $lines[] as $line
+    ({out: [], in_diff: false};
+      if ($line | test("^diff --git ")) then {out: .out, in_diff: true}
+      elif .in_diff then .
+      else {out: (.out + [$line]), in_diff: false}
+      end)
+  ).out | join("\n");
+
+def non_empty_lines:
+  split("\n") | map(select(length > 0));
+
+# aligns continuation lines under the "    < " prefix (6 chars) so multi-line
+# results read as one indented block instead of falling back to column 0.
+def indent_continuations:
+  gsub("\n"; "\n      ");
+
+def tool_summary($name; $input):
+  if $name == "Bash" then
+    ($input.command // "" | tostring | strip_ansi) as $cmd |
+    if ($cmd | test("git\\s+commit\\b.*-m\\s+\"")) then
+      "git commit: " + ($cmd | capture("-m\\s+\"(?<msg>[^\\n\"]*)").msg | truncate(150))
+    else
+      ($cmd | truncate(150))
+    end
+  else ($input | tostring | strip_ansi | truncate(150))
   end;
 
-if .type == "system" and .subtype == "init" then
-  "=== session started (model: \(.model)) ==="
-elif .type == "assistant" then
-  (.message.content[]? |
-    if .type == "text" then
-      .text
-    elif .type == "tool_use" then
-      "  > " + .name + "(" + tool_summary + ")"
-    else empty
-    end)
-elif .type == "user" then
-  (.message.content[]? |
-    if .type == "tool_result" then
-      (if (.content | type) == "array" then
-        (.content | map(.text? // "") | join(" "))
+# vitest: pull the "Test Files"/"Tests" summary lines plus each FAIL entry,
+# regardless of where they land in the (already tail-truncated) output.
+def summarize_vitest:
+  (split("\n")) as $lines |
+  ($lines | map(select(test("^\\s*(Test Files|Tests)\\s")))) as $summary_lines |
+  ($lines
+    | map(select(test("^\\s*FAIL\\s+\\S+\\s+")))
+    | map(capture("^\\s*FAIL\\s+\\S+\\s+(?<rest>.+)$").rest)
+  ) as $failed |
+  ($summary_lines | join("\n")) as $summary |
+  if ($failed | length) > 0 then
+    $summary + "\n" + ($failed | map("  FAILED " + .) | join("\n"))
+  else
+    $summary
+  end;
+
+# tsc: each "<file>:<line>:<col> - error TSxxxx: ..." line plus the closing
+# "Found N errors in M files." line.
+def summarize_tsc:
+  (split("\n")) as $lines |
+  ($lines | map(select(test("^\\S+\\.tsx?:[0-9]+:[0-9]+ - error TS")))) as $errors |
+  ($lines | map(select(test("^Found [0-9]+ errors? in"))) | first) as $found_line |
+  ($errors | map("  " + .) | join("\n")) as $body |
+  if $found_line then $found_line + "\n" + $body else $body end;
+
+# eslint (stylish formatter): each file header groups its own indented
+# "<line>:<col>  error|warning  message  rule" lines; track the current file
+# as we walk so each problem line can be reattached to it.
+def summarize_eslint:
+  (split("\n")) as $lines |
+  (reduce $lines[] as $line
+    ({file: null, out: []};
+      if ($line | test("^\\S.*\\.(ts|tsx|js|jsx|mjs|cjs)$")) then
+        {file: $line, out: .out}
+      elif ($line | test("^\\s+[0-9]+:[0-9]+\\s+(error|warning)\\s")) then
+        .out += [(.file // "?") + "  " + ($line | ltrimstr(" "))]
       else
-        (.content | tostring)
-      end) as $text |
-      "    < " + ($text | truncate(200))
-    else empty
-    end)
-elif .type == "result" then
-  "=== session done: \(.subtype) | $\((.total_cost_usd * 10000 | round) / 10000) | \((.duration_ms / 1000) | floor)s | \(.num_turns) turns ==="
-else
-  empty
-end
+        .
+      end)
+  ) as $acc |
+  ($lines | map(select(test("^✖ [0-9]+ problems? \\("))) | first) as $summary_line |
+  ($acc.out | map("  " + .) | join("\n")) as $body |
+  if $summary_line then $summary_line + "\n" + $body else $body end;
+
+# git status --short: condense the "XY <path>" lines into a count per status
+# code (modified/added/deleted/renamed/untracked); any non-status lines in
+# the same output (e.g. a chained "git log --oneline") pass through as-is.
+def summarize_git_status:
+  (non_empty_lines) as $lines |
+  ($lines | map(select(test("^[ MADRCU?]{2}\\s\\S")))) as $status_lines |
+  ($lines | map(select(test("^[ MADRCU?]{2}\\s\\S") | not))) as $other_lines |
+  (if ($status_lines | length) == 0 then null
+   else
+     ($status_lines | map(.[0:2])) as $codes |
+     ([
+       {k: "modified",  n: ($codes | map(select(contains("M"))) | length)},
+       {k: "added",     n: ($codes | map(select(contains("A"))) | length)},
+       {k: "deleted",   n: ($codes | map(select(contains("D"))) | length)},
+       {k: "renamed",   n: ($codes | map(select(contains("R"))) | length)},
+       {k: "untracked", n: ($codes | map(select(. == "??")) | length)}
+     ] | map(select(.n > 0)) | map("\(.n) \(.k)") | join(", "))
+   end) as $status_summary |
+  ([$status_summary] + $other_lines | map(select(. != null)) | join("\n"));
+
+# git commit: keep just the "[branch hash] subject" confirmation line and the
+# diffstat summary, dropping the lefthook/commitlint box-drawing noise and
+# per-file "create mode"/"delete mode" listing in between.
+def summarize_git_commit:
+  (split("\n")) as $lines |
+  ($lines | map(select(test("^\\[\\S+ [0-9a-f]{6,}\\] "))) | first) as $commit_line |
+  ($lines | map(select(test("[0-9]+ files? changed"))) | first) as $diffstat_line |
+  ([$commit_line, $diffstat_line] | map(select(. != null)) | join("\n"));
+
+# true for a Bash command that's purely dumping/listing file contents -
+# chains of cat/ls/echo/head/tail joined by "&&"/";"/"||" (optionally behind
+# "cd ... &&", "2>/dev/null" fallbacks, and "| head -N"/"| tail -N" trims).
+# Same noise-vs-signal tradeoff as the Read tool suppression above: the
+# request line already shows what was inspected, so the dump adds nothing.
+def is_pure_inspect($cmd):
+  ($cmd | sub("^cd\\s+\"[^\"]*\"\\s*&&\\s*"; "")) as $rest |
+  ([$rest | splits("\\s*(&&|\\|\\||;)\\s*")]) as $parts |
+  ($parts | length) > 0 and
+  ($parts | all(
+    test("^(cat|ls|echo|head|tail|find)\\b[^|<>]*(\\s+2>\\s*(/dev/null|&1))?(\\s*\\|\\s*(head|tail)\\b[^|<>]*)?$")
+    or
+    test("^(tasklist|ps)\\b[^|<>]*(\\s+2>\\s*(/dev/null|&1))?(\\s*\\|\\s*grep\\b[^|<>]*)?$")
+  ));
+
+def summarize_bash:
+  . as $text |
+  if ($text | test(" Test Files ")) then summarize_vitest
+  elif ($text | test("error TS[0-9]+:")) then summarize_tsc
+  elif ($text | test("✖ [0-9]+ problems? \\(")) then summarize_eslint
+  elif ($text | test("Ready in [0-9.]+\\s*m?s")) then
+    (split("\n") | map(select(test("Ready in [0-9.]+\\s*m?s"))) | first)
+  else
+    (non_empty_lines) as $lines |
+    ($lines | map(select(test("^\\[[A-Z]+\\]"))) | length) as $tagged |
+    if $tagged >= 2 and
+       ($lines[-1] | test("success|complete|done|failed|error"; "i") or test("[✅❌]")) then
+      $lines[-1]
+    else
+      ($lines | if length > 5 then .[-5:] else . end | join("\n") | truncate(300))
+    end
+  end;
+
+# recognizes a Bash-invoked "grep <pattern> ..." (optionally behind "cd ...
+# &&" and a trailing "| head/tail -N"); returns the pattern so it gets the
+# same one-line match-count summary as the dedicated Grep tool, instead of
+# dumping every matched line.
+def bash_grep_pattern($cmd):
+  ($cmd | sub("^cd\\s+\"[^\"]*\"\\s*&&\\s*"; "")) as $rest |
+  ($rest | sub("\\s*\\|\\s*(head|tail)\\b.*$"; "")) as $core |
+  if ($core | test("^grep\\s")) then
+    ($core | capture("^grep\\s+(-[a-zA-Z]+\\s+)*\"(?<pat>[^\"]*)\"").pat // null)
+  else
+    null
+  end;
+
+def tool_result_text($content):
+  if ($content | type) == "array" then
+    ($content | map(.text? // "") | join(" "))
+  else
+    ($content | tostring)
+  end;
+
+def format_event($event; $tools):
+  if $event.type == "system" and $event.subtype == "init" then
+    "=== session started (model: \($event.model)) ==="
+  elif $event.type == "assistant" then
+    ($event.message.content[]? |
+      if .type == "text" then
+        .text
+      elif .type == "tool_use" then
+        "  > " + .name + "(" + tool_summary(.name; .input) + ")"
+      else empty
+      end)
+  elif $event.type == "user" then
+    ($event.message.content[]? |
+      if .type == "tool_result" then
+        ($tools[.tool_use_id] // {}) as $tool |
+        ($tool.name // "") as $tool_name |
+        (tool_result_text(.content) | strip_ansi | strip_cr | strip_git_crlf_warnings | strip_git_diff_body) as $text |
+        if $tool_name == "Read" then
+          empty
+        elif $tool_name == "Glob" then
+          ($text | non_empty_lines | length) as $n |
+          "    < found " + ($n | tostring) +
+            (if $n == 1 then " file matching \"" else " files matching \"" end) +
+            ($tool.input.pattern // "?") + "\""
+        elif $tool_name == "Grep" then
+          ($text | non_empty_lines | length) as $n |
+          ($tool.input.output_mode == "files_with_matches") as $is_files |
+          "    < " + ($n | tostring) +
+            (if $is_files then (if $n == 1 then " file" else " files" end)
+             else (if $n == 1 then " match" else " matches" end) end) +
+            " for \"" + ($tool.input.pattern // "?") + "\""
+        elif $tool_name == "Bash" and is_pure_inspect($tool.input.command // "") then
+          empty
+        elif $tool_name == "Bash" then
+          ($tool.input.command // "") as $cmd |
+          (bash_grep_pattern($cmd)) as $grep_pat |
+          if $grep_pat then
+            ($text | non_empty_lines | length) as $n |
+            "    < " + ($n | tostring) + (if $n == 1 then " match" else " matches" end) +
+              " for \"" + $grep_pat + "\""
+          elif ($cmd | test("git\\s+commit\\b")) then
+            "    < " + ($text | summarize_git_commit | indent_continuations)
+          elif ($cmd | test("git\\s+status\\b.*(--short|-s)\\b")) then
+            "    < " + ($text | summarize_git_status | indent_continuations)
+          else
+            "    < " + ($text | summarize_bash | indent_continuations)
+          end
+        else
+          "    < " + ($text | truncate(200) | indent_continuations)
+        end
+      else empty
+      end)
+  elif $event.type == "result" then
+    "=== session done: \($event.subtype) | $\(($event.total_cost_usd * 10000 | round) / 10000) | \(($event.duration_ms / 1000) | floor)s | \($event.num_turns) turns ==="
+  else
+    empty
+  end;
+
+foreach (., inputs) as $event
+  ( {};
+    if $event.type == "assistant" then
+      reduce ($event.message.content[]? | select(.type == "tool_use")) as $tu
+        (.; .[$tu.id] = {name: $tu.name, input: $tu.input})
+    else . end;
+    format_event($event; .)
+  )
diff --git a/overnight.sh b/overnight.sh
index 70eca8b..f657ae1 100644
--- a/overnight.sh
+++ b/overnight.sh
@@ -116,6 +116,21 @@ run_repo() {
     | jq -r -f format-stream.jq \
     | tee "$readable_log"
 
+  # Append genuine tool/harness errors (is_error results - permission denials,
+  # bad exit codes, missing files) to the same errlog used for the claude
+  # process's own stderr, then drop the file entirely if nothing landed in it.
+  jq -r '
+    select(.type == "user") | .message.content[]? |
+    select(.type == "tool_result" and .is_error == true) |
+    (if (.content | type) == "array" then
+      (.content | map(.text? // "") | join(" "))
+    else
+      (.content | tostring)
+    end) |
+    gsub("\\[[0-9;]*[a-zA-Z]"; "")
+  ' "$raw_log" >> "$errlog"
+  [[ -s "$errlog" ]] || rm -f "$errlog"
+
   update_stats "$name" "$raw_log"
 }