diff --git a/docs/README.md b/docs/README.md
index 1b8243f..d4815d9 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -108,6 +108,48 @@ never fail the run. The default `--fail-on=any` fails on any finding, as
 before. `--strict` is for gates that must not silently pass because a scanner
 was missing on the machine.
 
+### What the scanners cover
+
+| Surface | Scanner |
+|---|---|
+| npm / yarn / pnpm / bun lockfiles | osv |
+| Maven / Gradle (`pom.xml`, `gradle.lockfile`) | osv |
+| Python / Ruby / Go / Rust / PHP / Dart / .NET lockfiles | osv |
+| Secrets in git history | gitleaks |
+| Secrets in working files | trufflehog |
+| JS/TS source (SAST) | semgrep `p/default` |
+| Swift / Kotlin / Java mobile source | semgrep `p/mobsfscan` (auto, on native mobile source) |
+| Bicep, Terraform, GitHub Actions, Docker, K8s | checkov |
+| Malicious package behaviour | socket (opt-in) |
+
+Not covered - know your blind spots: CocoaPods advisories (OSV has no
+CocoaPods ecosystem, so `Podfile.lock` yields nothing), compiled IPA/APK/AAB
+binaries, Expo `app.json`/`eas.json` and Info.plist/AndroidManifest
+semantics, and a bare `package.json` with no lockfile. Expo-managed repos
+with no `ios/`/`android/` dir are fine: their native layer is the npm
+packages, which are covered. Each repo's report includes a `Coverage:` line
+listing exactly which manifest files osv parsed (or "no package manifests
+parsed", so silence never masquerades as coverage).
+
+### Baselines (accepted findings)
+
+Accepted findings live in each tool's native file at the repo root - no
+SecKit-specific format, so reasons and expiry are reviewed in the PR that
+edits the file: `.gitleaks.toml` / `.gitleaksignore`, `osv-scanner.toml`
+(`[[IgnoredVulns]]` with `reason` and `ignoreUntil`), `.semgrepignore` /
+`# nosemgrep`, `.checkov.baseline` (create with `checkov -d .
+--create-baseline`), `.trufflehog-exclude` (one path regex per line). The
+checkov and trufflehog files are passed automatically when present;
+gitleaks reads its ignore files from the scanned repo.
+
+Two placement/scope caveats, both verified against the shipped tools:
+`osv-scanner.toml` must sit **beside each manifest** it applies to (osv only
+loads the config next to the lockfile being scanned - a root-level file does
+nothing for a nested `apps/*/package-lock.json`). And checkov baselines match
+on **resource name + check id only, across files**: a same-named resource in
+a new file silently inherits the suppression, so review `.checkov.baseline`
+diffs with care.
+
 ## Harden a repo against AI agents
 
 `seckit harden` stops **Claude Code and GitHub Copilot** pulling secrets into
diff --git a/scan_repos.ps1 b/scan_repos.ps1
index 10d2008..ad0deac 100644
--- a/scan_repos.ps1
+++ b/scan_repos.ps1
@@ -172,6 +172,17 @@ function Test-CleanWarning([string]$Key, [string]$Log) {
   return $false
 }
 
+# osv logs "Scanned <path> file and found N packages" - lift those lines into
+# a Coverage line so the scan says what was actually parsed. Paths relative
+# to the repo.
+function Get-Coverage([string]$Repo, [string]$Log) {
+  if (-not (Test-Path -LiteralPath $Log)) { return '' }
+  $text = Get-Content -LiteralPath $Log -Raw -ErrorAction SilentlyContinue
+  $found = [regex]::Matches("$text", 'Scanned [^\r\n]+ file and found [0-9]+ packages?') |
+    ForEach-Object { $_.Value.Replace("Scanned $Repo/", 'Scanned ').Replace("Scanned $Repo\", 'Scanned ') }
+  return (@($found) -join '; ')
+}
+
 # -FailOn high: is this non-zero scanner exit below the failure threshold?
 # Mirrors seckit_below_threshold in scan_repos.sh.
 function Test-BelowThreshold([string]$Key, [string]$Log) {
@@ -224,20 +235,36 @@ foreach ($repo in $repos) {
   if ((Want 'osv') -and (Have osv-scanner)) {
     Write-Host "- osv-scanner (vulnerable deps)" -ForegroundColor DarkGray
     $rc = Invoke-Scan -Key 'osv' -Repo $repo -Cmd { & osv-scanner -r $repo }
+    $cov = Get-Coverage -Repo $repo -Log $Results[$Results.Count - 1].Log
+    if (-not $cov) { $cov = 'no package manifests parsed' }
+    Write-Host "  coverage: $cov" -ForegroundColor DarkGray
     if ($rc -ne 0) { $hit = $true }
   }
   if ((Want 'gitleaks') -and $gl) {
     Write-Host "- gitleaks (secrets in git history)" -ForegroundColor DarkGray
     if ($gl -eq 'git') {
-      $rc = Invoke-Scan -Key 'gitleaks' -Repo $repo -Cmd { & gitleaks git $repo --redact --no-banner }
+      # --gitleaks-ignore-path: read .gitleaksignore from the scanned repo,
+      # not from whatever directory seckit happens to be invoked from.
+      $rc = Invoke-Scan -Key 'gitleaks' -Repo $repo -Cmd { & gitleaks git $repo --redact --no-banner --gitleaks-ignore-path $repo }
     } else {
-      $rc = Invoke-Scan -Key 'gitleaks' -Repo $repo -Cmd { & gitleaks detect --source $repo --redact --no-banner }
+      $rc = Invoke-Scan -Key 'gitleaks' -Repo $repo -Cmd { & gitleaks detect --source $repo --redact --no-banner --gitleaks-ignore-path $repo }
     }
     if ($rc -ne 0) { $hit = $true }
   }
   if ((Want 'trufflehog') -and (Have trufflehog)) {
     Write-Host "- trufflehog (secrets in files)" -ForegroundColor DarkGray
-    $rc = Invoke-Scan -Key 'trufflehog' -Repo $repo -Cmd { & trufflehog filesystem $repo --no-update --fail 2> $null }
+    $thArgs = @()
+    if (Test-Path -LiteralPath (Join-Path $repo '.trufflehog-exclude')) { $thArgs = @('-x', (Join-Path $repo '.trufflehog-exclude')) }
+    $rc = Invoke-Scan -Key 'trufflehog' -Repo $repo -Cmd {
+      $thErr = Join-Path $LogDir 'trufflehog.stderr'
+      & trufflehog filesystem $repo --no-update --fail @thArgs 2> $thErr
+      # --fail exits 183 on findings; any other non-zero is a tool error
+      # (e.g. a bad regex in .trufflehog-exclude) - surface the reason.
+      if ($LASTEXITCODE -ne 0 -and $LASTEXITCODE -ne 183) {
+        "trufflehog error (exit $LASTEXITCODE):"
+        Get-Content -LiteralPath $thErr -Tail 3 -ErrorAction SilentlyContinue
+      }
+    }
     if ($rc -ne 0) { $hit = $true }
   }
   if ((Want 'semgrep') -and (Have semgrep)) {
@@ -256,7 +283,11 @@ foreach ($repo in $repos) {
   }
   if ((Want 'checkov') -and (Have checkov)) {
     Write-Host "- checkov (IaC misconfig)" -ForegroundColor DarkGray
-    $rc = Invoke-Scan -Key 'checkov' -Repo $repo -Cmd { & checkov -d $repo --quiet --compact --skip-path node_modules }
+    # Accepted findings live in checkov's own baseline format; create with
+    # `checkov -d . --create-baseline`. Passed only when the file exists.
+    $ckArgs = @('-d', $repo, '--quiet', '--compact', '--skip-path', 'node_modules')
+    if (Test-Path -LiteralPath (Join-Path $repo '.checkov.baseline')) { $ckArgs += @('--baseline', (Join-Path $repo '.checkov.baseline')) }
+    $rc = Invoke-Scan -Key 'checkov' -Repo $repo -Cmd { & checkov @ckArgs }
     if ($rc -ne 0) { $hit = $true }
   }
   if ((Want 'socket') -and (Have socket)) {
@@ -398,12 +429,16 @@ if ($ranKeys.Count -and $repos.Count) {
   [void]$md.AppendLine('_`-` = scanner did not apply to that repo, `0` = clean, counts are approximate._')
   [void]$md.AppendLine()
   foreach ($row in ($Results | Where-Object { $_.Scanner -eq 'osv' })) {
+    $rel = if ($row.Repo -eq $Root) { '.' } else { $row.Repo.Substring($Root.Length).TrimStart('\','/') }
     $sev = Get-OsvSeverity -Log $row.Log
     if ($sev) {
-      $rel = if ($row.Repo -eq $Root) { '.' } else { $row.Repo.Substring($Root.Length).TrimStart('\','/') }
       [void]$md.AppendLine("**osv severity (``$rel``):** $sev")
       [void]$md.AppendLine()
     }
+    $cov = Get-Coverage -Repo $row.Repo -Log $row.Log
+    if (-not $cov) { $cov = 'no package manifests parsed' }
+    [void]$md.AppendLine("**Coverage (``$rel``):** $cov")
+    [void]$md.AppendLine()
   }
 }
 
diff --git a/scan_repos.sh b/scan_repos.sh
index 85fc2ac..aaae03e 100644
--- a/scan_repos.sh
+++ b/scan_repos.sh
@@ -198,7 +198,29 @@ run_scan() {
 
 # trufflehog: keep findings (stdout) but drop noisy progress (stderr).
 _seckit_trufflehog() {
-  trufflehog filesystem "$1" --no-update --fail 2>/dev/null
+  local x=() err rc
+  [[ -f "$1/.trufflehog-exclude" ]] && x=(-x "$1/.trufflehog-exclude")
+  err="${TMPDIR:-/tmp}/seckit-th-$$.err"
+  trufflehog filesystem "$1" --no-update --fail ${x[@]+"${x[@]}"} 2>"$err"
+  rc=$?
+  # --fail exits 183 on findings; any other non-zero is a tool error (e.g. a
+  # bad regex in .trufflehog-exclude) - surface it instead of a silent red.
+  if (( rc != 0 && rc != 183 )); then
+    echo "trufflehog error (exit $rc):"; tail -n 3 "$err"
+  fi
+  rm -f "$err"
+  return $rc
+}
+
+# osv logs "Scanned <path> file and found N packages" - lift those lines into
+# a Coverage line so the scan says what was actually parsed, not just what it
+# found. Paths are shown relative to the repo.
+seckit_coverage() {
+  local repo="$1" log="$2"
+  [[ -f "$log" ]] || return 0
+  grep -oE 'Scanned .* file and found [0-9]+ packages?' "$log" 2>/dev/null \
+    | sed -e "s|Scanned $repo/|Scanned |" \
+    | awk 'NR>1{printf "; "} {printf "%s", $0} END{if(NR)print ""}'
 }
 
 # Native mobile source (Swift/Kotlin/ObjC, or an Android manifest) outside
@@ -272,14 +294,20 @@ for repo in "${repos[@]}"; do
   if want osv && have osv-scanner; then
     echo "${DIM}- osv-scanner (vulnerable deps)${RST}"
     _seckit_run_and_count osv "$repo" osv-scanner -r "$repo" || hit=1
+    last="${RESULTS[$((${#RESULTS[@]} - 1))]}"
+    cov="$(seckit_coverage "$repo" "${last##*|}")"
+    [[ -z "$cov" ]] && cov="no package manifests parsed"
+    echo "  ${DIM}coverage: ${cov}${RST}"
   fi
 
   if want gitleaks && [[ -n "$GL" ]]; then
     echo "${DIM}- gitleaks (secrets in git history)${RST}"
     if [[ "$GL" == "git" ]]; then
-      _seckit_run_and_count gitleaks "$repo" gitleaks git "$repo" --redact --no-banner || hit=1
+      # --gitleaks-ignore-path: read .gitleaksignore from the scanned repo,
+      # not from whatever directory seckit happens to be invoked from.
+      _seckit_run_and_count gitleaks "$repo" gitleaks git "$repo" --redact --no-banner --gitleaks-ignore-path "$repo" || hit=1
     else
-      _seckit_run_and_count gitleaks "$repo" gitleaks detect --source "$repo" --redact --no-banner || hit=1
+      _seckit_run_and_count gitleaks "$repo" gitleaks detect --source "$repo" --redact --no-banner --gitleaks-ignore-path "$repo" || hit=1
     fi
   fi
 
@@ -304,7 +332,11 @@ for repo in "${repos[@]}"; do
 
   if want checkov && have checkov; then
     echo "${DIM}- checkov (IaC misconfig)${RST}"
-    _seckit_run_and_count checkov "$repo" checkov -d "$repo" --quiet --compact --skip-path node_modules || hit=1
+    # Accepted findings live in checkov's own baseline format; create with
+    # `checkov -d . --create-baseline`. Passed only when the file exists.
+    ck_args=(-d "$repo" --quiet --compact --skip-path node_modules)
+    [[ -f "$repo/.checkov.baseline" ]] && ck_args+=(--baseline "$repo/.checkov.baseline")
+    _seckit_run_and_count checkov "$repo" checkov "${ck_args[@]}" || hit=1
   fi
 
   if want socket && have socket; then
@@ -450,6 +482,9 @@ PROMPT_HEAD
       sev="$(seckit_osv_severity "$lg")"
       rel="${r#"$ROOT"/}"; [[ "$rel" == "$r" ]] && rel='.'
       [[ -n "$sev" ]] && printf '**osv severity (`%s`):** %s\n\n' "$rel" "$sev"
+      cov="$(seckit_coverage "$r" "$lg")"
+      [[ -z "$cov" ]] && cov="no package manifests parsed"
+      printf '**Coverage (`%s`):** %s\n\n' "$rel" "$cov"
     done
   fi