fix(cli): env-aware config, pull clobber guard, strict overlays, 409 hint

Four review fixes on the `pic` surface:

- `config --effective` gains `--env`: it now resolves through the same
  overlay as `plan`/`apply`, so the masked report targets the app those
  commands act on instead of silently reading the base slug's secrets.
- `pull` gains `--force` and refuses to overwrite an existing
  `picloud.toml` (and colliding `scripts/*.rhai`) without it — fail-fast
  before any network call or write, mirroring `init`.
- Overlays (`ManifestOverlay`/`OverlayApp`) get `deny_unknown_fields`: a
  `[[scripts]]`/`[[routes]]`/`[[triggers]]` table or a typo'd key in an
  overlay now errors loudly instead of being silently dropped. +unit test.
- `apply` 409 (StateMoved — the only 409 the endpoint emits) surfaces an
  actionable hint (re-run `pic plan`, or `--force`) instead of a bare
  `HTTP 409`.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/picloud-cli/src/client.rs

@@ -933,6 +933,19 @@ impl Client {
             .json(&body)
             .send()
             .await?;
+        // The apply endpoint returns 409 only for a stale bound plan
+        // (`StateMoved`): the app changed since `pic plan` recorded its
+        // token. Surface an actionable next step instead of a bare
+        // `HTTP 409`.
+        if resp.status() == reqwest::StatusCode::CONFLICT {
+            let body = resp.text().await.unwrap_or_default();
+            let msg = parse_error_body(&body).unwrap_or(body);
+            return Err(anyhow!(
+                "{msg}\nThe app changed since your last `pic plan`. Re-run \
+                 `pic plan` to review the new diff, then `pic apply` — or \
+                 `pic apply --force` to apply without re-reviewing."
+            ));
+        }
         decode(resp).await
     }
 }

crates/picloud-cli/src/cmds/config.rs

@@ -18,13 +18,21 @@ use crate::config;
 use crate::manifest::Manifest;
 use crate::output::{OutputMode, Table};
 
-pub async fn run(manifest_path: &Path, effective: bool, mode: OutputMode) -> Result<()> {
+pub async fn run(
+    manifest_path: &Path,
+    effective: bool,
+    env: Option<&str>,
+    mode: OutputMode,
+) -> Result<()> {
     if !effective {
         bail!("`pic config` currently supports only `--effective`");
     }
     let creds = config::resolve()?;
     let client = Client::from_creds(&creds)?;
-    let manifest = Manifest::load(manifest_path)?;
+    // Resolve against the same env overlay as `pic plan`/`apply` so the
+    // masked report targets the app those commands would act on — not the
+    // base slug — when an overlay re-points slug/secrets.
+    let manifest = Manifest::load_with_env(manifest_path, env)?;
 
     let declared: BTreeSet<String> = manifest.secrets.names.iter().cloned().collect();
     let on_server: BTreeSet<String> = client

crates/picloud-cli/src/cmds/pull.rs

@@ -23,10 +23,24 @@ use crate::manifest::{
 };
 use crate::output::{KvBlock, OutputMode};
 
-pub async fn run(app_ident: &str, dir: &Path, mode: OutputMode) -> Result<()> {
+pub async fn run(app_ident: &str, dir: &Path, force: bool, mode: OutputMode) -> Result<()> {
     let creds = config::resolve()?;
     let client = Client::from_creds(&creds)?;
 
+    // Refuse to clobber an existing project (mirrors `pic init`). `pull`
+    // overwrites `picloud.toml` and every colliding `scripts/*.rhai`, so a
+    // stray `pic pull <wrong-app>` in a populated dir would destroy local
+    // edits. Fail fast — before any network call or file write — unless the
+    // operator opted in with `--force`.
+    let manifest_path = dir.join(MANIFEST_FILE);
+    if !force && manifest_path.exists() {
+        anyhow::bail!(
+            "{} already exists; refusing to overwrite. Re-run with --force to \
+             replace it (and any colliding scripts/*.rhai).",
+            manifest_path.display()
+        );
+    }
+
     // One GET per resource kind (routes are per-script, below).
     let app = client.apps_get(app_ident).await?;
     let scripts = client.scripts_list_by_app(app_ident).await?;
@@ -189,7 +203,6 @@ pub async fn run(app_ident: &str, dir: &Path, mode: OutputMode) -> Result<()> {
         },
     };
 
-    let manifest_path = dir.join(MANIFEST_FILE);
     std::fs::write(&manifest_path, manifest.to_toml()?)
         .with_context(|| format!("writing {}", manifest_path.display()))?;
 

crates/picloud-cli/src/main.rs

@@ -224,6 +224,9 @@ struct PullArgs {
     /// Directory to write `picloud.toml` + `scripts/` into.
     #[arg(long, default_value = ".")]
     dir: PathBuf,
+    /// Overwrite an existing `picloud.toml` (and colliding `scripts/*.rhai`).
+    #[arg(long)]
+    force: bool,
 }
 
 #[derive(Args)]
@@ -250,6 +253,10 @@ struct ConfigArgs {
     /// Show the effective (resolved) config with secrets masked.
     #[arg(long)]
     effective: bool,
+    /// Resolve against the `picloud.<env>.toml` overlay (per-env slug +
+    /// secrets), matching `pic plan --env` / `pic apply --env`.
+    #[arg(long)]
+    env: Option<String>,
 }
 
 #[derive(Subcommand)]
@@ -1151,8 +1158,10 @@ async fn main() -> ExitCode {
             .await
         }
         Cmd::Plan(args) => cmds::plan::run(&args.file, args.env.as_deref(), mode).await,
-        Cmd::Pull(args) => cmds::pull::run(&args.app, &args.dir, mode).await,
+        Cmd::Pull(args) => cmds::pull::run(&args.app, &args.dir, args.force, mode).await,
-        Cmd::Config(args) => cmds::config::run(&args.file, args.effective, mode).await,
+        Cmd::Config(args) => {
+            cmds::config::run(&args.file, args.effective, args.env.as_deref(), mode).await
+        }
         Cmd::Init(args) => cmds::init::run(
             &args.dir,
             args.slug.as_deref(),

crates/picloud-cli/src/manifest.rs

@@ -112,7 +112,13 @@ fn overlay_path(base_path: &Path, env: &str) -> std::path::PathBuf {
 
 /// A sparse per-environment overlay (`picloud.<env>.toml`). Only the fields
 /// that vary per environment today — slug/name and secret names.
+///
+/// `deny_unknown_fields`: an overlay can carry *only* `[app]` and `[secrets]`.
+/// Scripts/routes/triggers belong in the shared base manifest, so a
+/// `[[scripts]]`/`[[routes]]`/`[[triggers]]` table (or a typo'd key) in an
+/// overlay is a mistake — error loudly rather than silently dropping it.
 #[derive(Debug, Clone, Default, Deserialize)]
+#[serde(deny_unknown_fields)]
 pub struct ManifestOverlay {
     #[serde(default)]
     pub app: OverlayApp,
@@ -121,6 +127,7 @@ pub struct ManifestOverlay {
 }
 
 #[derive(Debug, Clone, Default, Deserialize)]
+#[serde(deny_unknown_fields)]
 pub struct OverlayApp {
     #[serde(default)]
     pub slug: Option<String>,
@@ -461,6 +468,26 @@ mod tests {
         assert_eq!(m.scripts.len(), 2);
     }
 
+    #[test]
+    fn overlay_rejects_non_overlay_tables() {
+        // An overlay carries only [app]/[secrets]. Scripts/routes/triggers
+        // belong in the shared base, so a `[[scripts]]` table (or a typo'd
+        // key) in an overlay must error loudly, not be silently dropped.
+        let err = toml::from_str::<ManifestOverlay>(
+            "[app]\nslug = \"blog-staging\"\n\n\
+             [[scripts]]\nname = \"hello\"\nfile = \"scripts/hello.rhai\"\n",
+        )
+        .expect_err("overlay with [[scripts]] must be rejected");
+        assert!(
+            err.to_string().contains("scripts") || err.to_string().contains("unknown"),
+            "error should point at the offending table: {err}"
+        );
+
+        // Typo'd key inside [app] is likewise rejected.
+        toml::from_str::<ManifestOverlay>("[app]\nslag = \"oops\"\n")
+            .expect_err("overlay with a typo'd [app] key must be rejected");
+    }
+
     #[test]
     fn overlay_path_derivation() {
         assert_eq!(