diff --git a/crates/smooth-cli/src/main.rs b/crates/smooth-cli/src/main.rs
index bcbbe9d6..5693a94d 100644
--- a/crates/smooth-cli/src/main.rs
+++ b/crates/smooth-cli/src/main.rs
@@ -149,6 +149,14 @@ enum Commands {
         #[command(subcommand)]
         cmd: OrgsCommands,
     },
+    /// Smoo AI Observability — error tracking (`errors list/show/ok/not-ok`)
+    /// and source maps. Top-level alias for `th api observability`, promoted
+    /// for discoverability alongside `th orgs` / `th config`.
+    #[command(visible_alias = "o11y")]
+    Observability {
+        #[command(subcommand)]
+        cmd: smooai::observability::Cmd,
+    },
     /// Smoo AI `@smooai/config` — the daily-developer config surface.
     /// `get` / `set` / `list` for single values; `feature-flag` to
     /// evaluate a flag; `push` / `pull` / `diff` to sync the
@@ -1567,6 +1575,7 @@ async fn main() -> Result<()> {
             ApiCommands::Observability { cmd } => smooai::observability::cmd(cmd).await,
         },
         Some(Commands::Org { cmd }) => cmd_orgs(cmd).await,
+        Some(Commands::Observability { cmd }) => smooai::observability::cmd(cmd).await,
         Some(Commands::Config { cmd }) => config::cmd(cmd).await,
         Some(Commands::Widgets { cmd }) => smooai::widgets::cmd(cmd).await,
         Some(Commands::Crawl { cmd }) => smooai::crawl::cmd(cmd).await,
diff --git a/crates/smooth-cli/src/smooai/observability.rs b/crates/smooth-cli/src/smooai/observability.rs
index c729bf48..d995699e 100644
--- a/crates/smooth-cli/src/smooai/observability.rs
+++ b/crates/smooth-cli/src/smooai/observability.rs
@@ -59,6 +59,70 @@ pub enum Cmd {
         #[arg(long = "org-id", visible_alias = "org")]
         org: Option<String>,
     },
+    /// Error tracking — list and triage the error groups the dashboard
+    /// dedups by fingerprint. `list` to see what's firing, `show` for the
+    /// rich detail + recent events, `ok`/`not-ok`/`mute` to set the review
+    /// status (resolved / unresolved / muted).
+    Errors {
+        #[command(subcommand)]
+        cmd: ErrorsCmd,
+    },
+}
+
+#[derive(Subcommand)]
+pub enum ErrorsCmd {
+    /// List error groups, most-recently-seen first (the triage view).
+    List {
+        /// Only show groups with this review status: `unresolved` (not-ok),
+        /// `resolved` (ok), or `muted`. Default: all.
+        #[arg(long)]
+        status: Option<String>,
+        /// Filter to one environment (`production`, `staging`, `development`).
+        #[arg(long)]
+        environment: Option<String>,
+        /// Max groups to return.
+        #[arg(long, default_value_t = 50)]
+        limit: u32,
+        /// Pagination cursor (`nextCursor` from a previous page).
+        #[arg(long)]
+        cursor: Option<String>,
+        /// Print raw JSON instead of the table.
+        #[arg(long)]
+        json: bool,
+        /// Override the active org. Falls back to `SMOOAI_ORG_ID` then the credentials file's `active_org_id`.
+        #[arg(long = "org-id", visible_alias = "org")]
+        org: Option<String>,
+    },
+    /// Show one error group + its recent events (full JSON detail).
+    Show {
+        /// Error group id (the `id` from `errors list`).
+        group_id: String,
+        #[arg(long = "org-id", visible_alias = "org")]
+        org: Option<String>,
+    },
+    /// Mark a group OK — you've reviewed it and it's fine (status → resolved).
+    Ok {
+        /// Error group id (the `id` from `errors list`).
+        group_id: String,
+        #[arg(long = "org-id", visible_alias = "org")]
+        org: Option<String>,
+    },
+    /// Mark a group NOT OK — it needs attention (status → unresolved).
+    #[command(name = "not-ok")]
+    NotOk {
+        /// Error group id (the `id` from `errors list`).
+        group_id: String,
+        #[arg(long = "org-id", visible_alias = "org")]
+        org: Option<String>,
+    },
+    /// Mute a group — known/accepted, hidden from the default triage view
+    /// (status → muted).
+    Mute {
+        /// Error group id (the `id` from `errors list`).
+        group_id: String,
+        #[arg(long = "org-id", visible_alias = "org")]
+        org: Option<String>,
+    },
 }
 
 pub async fn cmd(cmd: Cmd) -> Result<()> {
@@ -181,10 +245,146 @@ pub async fn cmd(cmd: Cmd) -> Result<()> {
             let resp = client.get(&path).await.context("GET sourcemaps/list")?;
             super::print_json(&resp);
         }
+
+        Cmd::Errors { cmd } => errors_cmd(&client, cmd).await?,
+    }
+    Ok(())
+}
+
+/// Map the friendly review verbs to the backend `error_group_status` enum.
+fn status_for_verb(verb: &str) -> &'static str {
+    match verb {
+        "ok" => "resolved",
+        "not-ok" => "unresolved",
+        "mute" => "muted",
+        _ => unreachable!("status_for_verb called with {verb}"),
+    }
+}
+
+async fn errors_cmd(client: &smooth_api_client::SmoothApiClient, cmd: ErrorsCmd) -> Result<()> {
+    match cmd {
+        ErrorsCmd::List {
+            status,
+            environment,
+            limit,
+            cursor,
+            json,
+            org,
+        } => {
+            let org = require_active_org(client, org)?;
+            let mut qs = format!("limit={limit}");
+            if let Some(s) = &status {
+                qs.push_str(&format!("&status={}", urlencoding::encode(s)));
+            }
+            if let Some(e) = &environment {
+                qs.push_str(&format!("&environment={}", urlencoding::encode(e)));
+            }
+            if let Some(c) = &cursor {
+                qs.push_str(&format!("&cursor={}", urlencoding::encode(c)));
+            }
+            let resp = client
+                .get(&format!("/organizations/{org}/observability/errors?{qs}"))
+                .await
+                .context("GET observability/errors")?;
+            if json {
+                super::print_json(&resp);
+                return Ok(());
+            }
+            print_error_groups(&resp);
+        }
+
+        ErrorsCmd::Show { group_id, org } => {
+            let org = require_active_org(client, org)?;
+            let resp = client
+                .get(&format!("/organizations/{org}/observability/errors/{group_id}"))
+                .await
+                .context("GET observability/errors/:id")?;
+            super::print_json(&resp);
+        }
+
+        // ok / not-ok / mute all PATCH the same status field — the only
+        // difference is the target enum value.
+        ErrorsCmd::Ok { group_id, org } => set_status(client, org, &group_id, "ok").await?,
+        ErrorsCmd::NotOk { group_id, org } => set_status(client, org, &group_id, "not-ok").await?,
+        ErrorsCmd::Mute { group_id, org } => set_status(client, org, &group_id, "mute").await?,
     }
     Ok(())
 }
 
+async fn set_status(client: &smooth_api_client::SmoothApiClient, org: Option<String>, group_id: &str, verb: &str) -> Result<()> {
+    let org = require_active_org(client, org)?;
+    let status = status_for_verb(verb);
+    let updated = client
+        .patch(
+            &format!("/organizations/{org}/observability/errors/{group_id}"),
+            &serde_json::json!({ "status": status }),
+        )
+        .await
+        .with_context(|| format!("PATCH observability/errors/{group_id}"))?;
+    let title = updated.get("title").and_then(|v| v.as_str()).unwrap_or("(unknown)");
+    println!();
+    println!("  {} {} → {}", "✓".green(), title.bold(), status.cyan());
+    println!("    {} {}", "group:".dimmed(), group_id.dimmed());
+    println!();
+    Ok(())
+}
+
+/// Render the `{ groups: [...], nextCursor }` list as a compact triage table.
+fn print_error_groups(resp: &serde_json::Value) {
+    let groups = resp.get("groups").and_then(|g| g.as_array()).cloned().unwrap_or_default();
+    println!();
+    if groups.is_empty() {
+        println!("  {} no error groups", "●".dimmed());
+        println!();
+        return;
+    }
+    for g in &groups {
+        let id = g.get("id").and_then(|v| v.as_str()).unwrap_or("?");
+        let status = g.get("status").and_then(|v| v.as_str()).unwrap_or("?");
+        let level = g.get("level").and_then(|v| v.as_str()).unwrap_or("?");
+        let env = g.get("environment").and_then(|v| v.as_str()).unwrap_or("?");
+        let count = g.get("eventCount").and_then(|v| v.as_i64()).unwrap_or(0);
+        let users = g.get("userCount").and_then(|v| v.as_i64()).unwrap_or(0);
+        let last_seen = g.get("lastSeenAt").and_then(|v| v.as_str()).unwrap_or("");
+        let title = g.get("title").and_then(|v| v.as_str()).unwrap_or("(untitled)");
+        let culprit = g.get("culprit").and_then(|v| v.as_str()).unwrap_or("");
+
+        // status glyph: unresolved = needs attention (red), resolved = ok
+        // (green), muted = dim.
+        let dot = match status {
+            "resolved" => "●".green().to_string(),
+            "muted" => "●".dimmed().to_string(),
+            _ => "●".red().to_string(),
+        };
+        println!("  {dot} {}", title.bold());
+        println!(
+            "    {} {}  {} {}  {} {}  {} {}  {} {}",
+            "id:".dimmed(),
+            id.dimmed(),
+            "status:".dimmed(),
+            status,
+            "level:".dimmed(),
+            level,
+            "env:".dimmed(),
+            env,
+            "seen:".dimmed(),
+            format!("{count}× / {users} users").dimmed(),
+        );
+        if !culprit.is_empty() {
+            println!("    {} {}", "at:".dimmed(), culprit.dimmed());
+        }
+        if !last_seen.is_empty() {
+            println!("    {} {}", "last:".dimmed(), last_seen.dimmed());
+        }
+        println!();
+    }
+    println!("  {} {} group{}", "●".cyan(), groups.len().bold(), if groups.len() == 1 { "" } else { "s" });
+    if let Some(next) = resp.get("nextCursor").and_then(|v| v.as_str()) {
+        println!("    {} --cursor {}", "more:".dimmed(), next.dimmed());
+    }
+    println!();
+}
+
 /// Walk `root` and return every file ending in `.map` whose stripped
 /// extension corresponds to a JavaScript bundle (`.js`, `.mjs`, `.cjs`).
 fn find_sourcemaps(root: &Path) -> Result<Vec<PathBuf>> {
@@ -211,3 +411,18 @@ fn find_sourcemaps(root: &Path) -> Result<Vec<PathBuf>> {
     out.sort();
     Ok(out)
 }
+
+#[cfg(test)]
+mod tests {
+    use super::status_for_verb;
+
+    // The friendly review verbs must map to the exact backend
+    // `error_group_status` enum values the PATCH endpoint validates —
+    // a drift here would send an invalid status and 400.
+    #[test]
+    fn verbs_map_to_backend_status() {
+        assert_eq!(status_for_verb("ok"), "resolved");
+        assert_eq!(status_for_verb("not-ok"), "unresolved");
+        assert_eq!(status_for_verb("mute"), "muted");
+    }
+}