feat: add profile source tree editor

.yoi/tickets/00001KX1JNJ2Y/item.md

@@ -2,7 +2,7 @@
 title: 'Add ProfileSourceTree virtual filesystem and Decodal profile editor'
 state: 'inprogress'
 created_at: '2026-07-08T19:18:25Z'
-updated_at: '2026-07-09T07:57:59Z'
+updated_at: '2026-07-09T08:22:18Z'
 assignee: null
 queued_by: 'workspace-panel'
 queued_at: '2026-07-09T07:56:07Z'

.yoi/tickets/00001KX1JNJ2Y/thread.md

@@ -123,4 +123,29 @@ Acceptance basis:
 - Ticket scope is ProfileSourceTree virtual filesystem + Decodal editor follow-up on top of closed Decodal/ProfileSourceArchive and Workspace/Profile settings work。
 - side effect はこの `queued -> inprogress` acceptance 後に、worktree-workflow に沿って implementation worktree を作成してから開始する。
 
+---
+
+<!-- event: implementation_report author: hare at: 2026-07-09T08:22:18Z -->
+
+## Implementation report
+
+Implemented ProfileSourceTree virtual source-tree support for project Decodal profiles.
+
+Summary:
+- Added Runtime archive manifest validation for virtual source metadata, duplicate/undeclared tar entries, scoped import-map keys, namespace/path safety, and current-source relative import resolution without filesystem reads.
+- Added Backend-owned project `ProfileSourceTree` API over virtual `profiles/...` paths, revision-aware read/write/delete file operations, path validation, tree scanning, import closure/archive building from tree contents, and project-profile config bundle generation from archives.
+- Extended workspace server routes and browser API/types for scoped profile source tree access without exposing host absolute paths or resource/archive internals.
+- Added a Profiles settings Decodal CodeMirror editor backed by virtual paths/revision tokens only.
+- Added worker-runtime tests for scoped virtual imports and import-map mismatch rejection.
+
+Validation:
+- `git diff --check`
+- `cargo test -p yoi-workspace-server`
+- `cargo test -p worker-runtime --features ws-server,fs-store`
+- `cargo check -p yoi`
+- `cd web/workspace && deno task check && deno task test`
+- `yoi ticket doctor`
+- `nix build .#yoi --no-link`
+
+
 ---

crates/worker-runtime/src/profile_archive.rs

@@ -2,7 +2,7 @@ use decodal::{Engine, LoadedSource, SourceLoader};
 use manifest::{ProfileSource, WorkerManifest, resolve_profile_artifact_value};
 use serde::{Deserialize, Serialize};
 use sha2::{Digest, Sha256};
-use std::collections::BTreeMap;
+use std::collections::{BTreeMap, BTreeSet};
 use std::io::{Cursor, Read, Write};
 use std::path::{Component, Path, PathBuf};
 use tar::{Archive, Builder, Header};
@@ -27,6 +27,10 @@ pub enum ProfileArchiveError {
     MissingManifest,
     #[error("profile source archive missing source {0}")]
     MissingSource(String),
+    #[error("profile source archive contains duplicate source {0}")]
+    DuplicateSource(String),
+    #[error("profile source archive contains source not declared in manifest {0}")]
+    UndeclaredSource(String),
     #[error(
         "profile source archive source digest mismatch for {path}: expected {expected}, got {actual}"
     )]
@@ -47,6 +51,14 @@ pub enum ProfileArchiveError {
     MissingEntrypoint(String),
     #[error("profile source archive import is not declared in manifest import map: {0}")]
     ImportNotDeclared(String),
+    #[error(
+        "profile source archive import map mismatch for {specifier}: expected {expected}, got {actual}"
+    )]
+    ImportMapMismatch {
+        specifier: String,
+        expected: String,
+        actual: String,
+    },
     #[error("failed to read profile source archive: {0}")]
     Io(String),
     #[error("failed to parse profile source archive manifest: {0}")]
@@ -94,7 +106,11 @@ pub struct ProfileSourceArchiveManifest {
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
 pub struct ProfileSourceArchiveSource {
     pub path: String,
+    #[serde(default)]
+    pub source_key: String,
     pub kind: String,
+    #[serde(default = "default_decodal_content_type")]
+    pub content_type: String,
     pub digest: String,
     pub size_bytes: u64,
 }
@@ -128,7 +144,9 @@ impl ProfileSourceArchive {
             }
             source_meta.push(ProfileSourceArchiveSource {
                 path: path.clone(),
+                source_key: path.clone(),
                 kind: "decodal".to_string(),
+                content_type: default_decodal_content_type(),
                 digest: sha256_hex(source.as_bytes()),
                 size_bytes: size,
             });
@@ -238,7 +256,9 @@ impl VerifiedProfileSourceArchive {
             } else {
                 let source = String::from_utf8(data)
                     .map_err(|err| ProfileArchiveError::Io(err.to_string()))?;
-                entries.insert(path, source);
+                if entries.insert(path.clone(), source).is_some() {
+                    return Err(ProfileArchiveError::DuplicateSource(path));
+                }
             }
             if entries.len() > MAX_SOURCES {
                 return Err(ProfileArchiveError::LimitExceeded("source count"));
@@ -258,8 +278,25 @@ impl VerifiedProfileSourceArchive {
             });
         }
         let mut total = 0u64;
+        let mut manifest_paths = BTreeSet::new();
         for source in &manifest.sources {
             validate_archive_path(&source.path)?;
+            if !source.source_key.is_empty() && source.source_key != source.path {
+                return Err(ProfileArchiveError::ImportMapMismatch {
+                    specifier: source.path.clone(),
+                    expected: source.path.clone(),
+                    actual: source.source_key.clone(),
+                });
+            }
+            if source.content_type != default_decodal_content_type() {
+                return Err(ProfileArchiveError::UnsupportedSource {
+                    path: source.path.clone(),
+                    kind: source.content_type.clone(),
+                });
+            }
+            if !manifest_paths.insert(source.path.clone()) {
+                return Err(ProfileArchiveError::DuplicateSource(source.path.clone()));
+            }
             if source.kind != "decodal" {
                 return Err(ProfileArchiveError::UnsupportedSource {
                     path: source.path.clone(),
@@ -285,6 +322,11 @@ impl VerifiedProfileSourceArchive {
             }
             total += size;
         }
+        for entry_path in entries.keys() {
+            if !manifest_paths.contains(entry_path) {
+                return Err(ProfileArchiveError::UndeclaredSource(entry_path.clone()));
+            }
+        }
         if total != reference.source_graph.total_source_bytes
             || manifest.sources.len() != reference.source_graph.source_count
         {
@@ -298,10 +340,13 @@ impl VerifiedProfileSourceArchive {
             .chain(manifest.imports.values())
         {
             validate_archive_path(path)?;
-            if !entries.contains_key(path) {
+            if !manifest_paths.contains(path) || !entries.contains_key(path) {
                 return Err(ProfileArchiveError::MissingSource(path.clone()));
             }
         }
+        for (key, path) in &manifest.imports {
+            validate_archive_import_map_entry(key, path, &manifest_paths)?;
+        }
         Ok(Self {
             reference,
             manifest,
@@ -313,6 +358,10 @@ impl VerifiedProfileSourceArchive {
         &self.reference
     }
 
+    pub fn manifest(&self) -> &ProfileSourceArchiveManifest {
+        &self.manifest
+    }
+
     pub fn resolve_profile(
         &self,
         selector: &str,
@@ -378,22 +427,26 @@ impl<'a> ArchiveSourceLoader<'a> {
 impl SourceLoader for ArchiveSourceLoader<'_> {
     fn load(
         &mut self,
-        _current_key: Option<&str>,
+        current_key: Option<&str>,
         specifier: &str,
     ) -> decodal::Result<LoadedSource> {
-        let path = self
+        let path =
-            .archive
+            archive_import_map_lookup(&self.archive.manifest.imports, current_key, specifier)
-            .manifest
+                .map_err(import_diagnostic)?;
-            .imports
+        if let Some(current_key) = current_key {
-            .get(specifier)
+            match resolve_archive_import_path(current_key, specifier) {
-            .ok_or_else(|| {
+                Ok(expected) if expected == path => {}
-                decodal::Diagnostic::new(
+                Ok(expected) => {
-                    decodal::DiagnosticKind::Import,
+                    return Err(import_diagnostic(ProfileArchiveError::ImportMapMismatch {
-                    decodal::Span::default(),
+                        specifier: format!("{current_key}\0{specifier}"),
-                    format!("archive import not declared: {specifier}"),
+                        expected,
-                )
+                        actual: path.clone(),
-            })?;
+                    }));
-        let source = self.archive.sources.get(path).ok_or_else(|| {
+                }
+                Err(err) => return Err(import_diagnostic(err)),
+            }
+        }
+        let source = self.archive.sources.get(&path).ok_or_else(|| {
             decodal::Diagnostic::new(
                 decodal::DiagnosticKind::Import,
                 decodal::Span::default(),
@@ -408,6 +461,123 @@ impl SourceLoader for ArchiveSourceLoader<'_> {
     }
 }
 
+fn default_decodal_content_type() -> String {
+    "text/x-decodal".to_string()
+}
+
+fn import_diagnostic(err: ProfileArchiveError) -> decodal::Diagnostic {
+    decodal::Diagnostic::new(
+        decodal::DiagnosticKind::Import,
+        decodal::Span::default(),
+        err.to_string(),
+    )
+}
+
+fn archive_import_map_lookup(
+    imports: &BTreeMap<String, String>,
+    current_key: Option<&str>,
+    specifier: &str,
+) -> Result<String, ProfileArchiveError> {
+    if let Some(current_key) = current_key {
+        let scoped = format!("{current_key}\0{specifier}");
+        if let Some(path) = imports.get(&scoped) {
+            return Ok(path.clone());
+        }
+    }
+    imports
+        .get(specifier)
+        .cloned()
+        .ok_or_else(|| ProfileArchiveError::ImportNotDeclared(specifier.to_string()))
+}
+
+fn validate_archive_import_map_entry(
+    key: &str,
+    path: &str,
+    manifest_paths: &BTreeSet<String>,
+) -> Result<(), ProfileArchiveError> {
+    if !manifest_paths.contains(path) {
+        return Err(ProfileArchiveError::MissingSource(path.to_string()));
+    }
+    if let Some((current_key, specifier)) = key.split_once('\0') {
+        validate_archive_path(current_key)?;
+        let expected = resolve_archive_import_path(current_key, specifier)?;
+        if expected != path {
+            return Err(ProfileArchiveError::ImportMapMismatch {
+                specifier: key.to_string(),
+                expected,
+                actual: path.to_string(),
+            });
+        }
+    } else {
+        validate_archive_import_specifier(key)?;
+    }
+    Ok(())
+}
+
+fn resolve_archive_import_path(
+    current_key: &str,
+    specifier: &str,
+) -> Result<String, ProfileArchiveError> {
+    validate_archive_path(current_key)?;
+    validate_archive_import_specifier(specifier)?;
+    let raw = if let Some(rest) = specifier.strip_prefix("project:") {
+        rest
+    } else if let Some(rest) = specifier.strip_prefix("workspace:") {
+        rest
+    } else {
+        specifier
+    };
+    let base = if raw.starts_with("./") || raw.starts_with("../") {
+        Path::new(current_key)
+            .parent()
+            .map(Path::to_path_buf)
+            .unwrap_or_default()
+            .join(raw)
+    } else {
+        PathBuf::from(raw)
+    };
+    normalize_archive_virtual_path(&base.to_string_lossy())
+}
+
+fn validate_archive_import_specifier(specifier: &str) -> Result<(), ProfileArchiveError> {
+    if specifier.is_empty()
+        || specifier.contains("://")
+        || specifier.starts_with('/')
+        || Path::new(specifier).is_absolute()
+    {
+        return Err(ProfileArchiveError::UnsafePath(specifier.to_string()));
+    }
+    if let Some((namespace, rest)) = specifier.split_once(':') {
+        if namespace != "project" && namespace != "workspace" {
+            return Err(ProfileArchiveError::UnsafePath(specifier.to_string()));
+        }
+        if rest.is_empty() || rest.starts_with('/') || rest.contains("://") {
+            return Err(ProfileArchiveError::UnsafePath(specifier.to_string()));
+        }
+    }
+    Ok(())
+}
+
+fn normalize_archive_virtual_path(path: &str) -> Result<String, ProfileArchiveError> {
+    let path_ref = Path::new(path);
+    if path_ref.is_absolute() {
+        return Err(ProfileArchiveError::UnsafePath(path.to_string()));
+    }
+    let mut out = PathBuf::new();
+    for component in path_ref.components() {
+        match component {
+            Component::CurDir => {}
+            Component::Normal(value) => out.push(value),
+            Component::ParentDir | Component::RootDir | Component::Prefix(_) => {
+                return Err(ProfileArchiveError::UnsafePath(path.to_string()));
+            }
+        }
+    }
+    let normalized = out.to_string_lossy().replace('\\', "/");
+    validate_archive_path(&normalized)?;
+    Ok(normalized)
+}
+
 fn decodal_data_to_json(data: &decodal::Data) -> serde_json::Value {
     match data {
         decodal::Data::Bool(value) => serde_json::Value::Bool(*value),
@@ -551,4 +721,56 @@ mod tests {
         let mut loader = ArchiveSourceLoader::new(&verified);
         assert!(loader.load(None, "missing").is_err());
     }
+
+    #[test]
+    fn archive_loader_resolves_scoped_virtual_imports() {
+        let mut entrypoints = BTreeMap::new();
+        entrypoints.insert("default".to_string(), "profiles/main.dcdl".to_string());
+        let mut imports = BTreeMap::new();
+        imports.insert(
+            "profiles/main.dcdl\0./shared.dcdl".to_string(),
+            "profiles/shared.dcdl".to_string(),
+        );
+        let mut sources = BTreeMap::new();
+        sources.insert("profiles/main.dcdl".to_string(), "{}".to_string());
+        sources.insert("profiles/shared.dcdl".to_string(), "{}".to_string());
+        let archive = ProfileSourceArchive::build(ProfileSourceArchiveInput {
+            id: "project".to_string(),
+            entrypoints,
+            imports,
+            sources,
+        })
+        .unwrap();
+        let verified = archive.verify().unwrap();
+        let mut loader = ArchiveSourceLoader::new(&verified);
+        let loaded = loader
+            .load(Some("profiles/main.dcdl"), "./shared.dcdl")
+            .unwrap();
+        assert_eq!(loaded.key, "profiles/shared.dcdl");
+    }
+
+    #[test]
+    fn archive_verify_rejects_import_map_that_bypasses_virtual_resolver() {
+        let mut entrypoints = BTreeMap::new();
+        entrypoints.insert("default".to_string(), "profiles/main.dcdl".to_string());
+        let mut imports = BTreeMap::new();
+        imports.insert(
+            "profiles/main.dcdl\0./shared.dcdl".to_string(),
+            "profiles/other.dcdl".to_string(),
+        );
+        let mut sources = BTreeMap::new();
+        sources.insert("profiles/main.dcdl".to_string(), "{}".to_string());
+        sources.insert("profiles/other.dcdl".to_string(), "{}".to_string());
+        let archive = ProfileSourceArchive::build(ProfileSourceArchiveInput {
+            id: "project".to_string(),
+            entrypoints,
+            imports,
+            sources,
+        })
+        .unwrap();
+        assert!(matches!(
+            archive.verify(),
+            Err(ProfileArchiveError::ImportMapMismatch { .. })
+        ));
+    }
 }

crates/workspace-server/src/profile_settings.rs

@@ -14,6 +14,8 @@ use crate::{Error, Result};
 
 const PROFILE_REGISTRY_RELATIVE_PATH: &str = ".yoi/profiles.toml";
 const PROFILE_SOURCE_ROOT_RELATIVE_PATH: &str = ".yoi/profiles";
+const PROFILE_SOURCE_TREE_ID: &str = "project";
+const PROFILE_SOURCE_TREE_DISPLAY_ROOT: &str = "profiles";
 const MAX_PROFILE_SOURCE_BYTES: u64 = 256 * 1024;
 const BUILTIN_PROFILE_IDS: &[&str] = &[
     "builtin:default",
@@ -63,6 +65,8 @@ pub struct ProfileSettingsResponse {
     pub default_profile: Option<String>,
     pub profiles: Vec<WorkspaceProfileSummary>,
     pub sources: Vec<WorkspaceProfileSourceSummary>,
+    #[serde(default)]
+    pub source_trees: Vec<WorkspaceProfileSourceTreeSummary>,
     pub diagnostics: Vec<RuntimeDiagnostic>,
 }
 
@@ -92,6 +96,45 @@ pub struct WorkspaceProfileSourceSummary {
     pub diagnostics: Vec<RuntimeDiagnostic>,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WorkspaceProfileSourceTreeSummary {
+    pub source_tree_id: String,
+    pub label: String,
+    pub root_path: String,
+    pub kind: String,
+    pub editable: bool,
+    pub revision: String,
+    pub file_count: usize,
+    pub diagnostics: Vec<RuntimeDiagnostic>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WorkspaceProfileSourceTreeFileSummary {
+    pub path: String,
+    pub kind: String,
+    pub editable: bool,
+    pub revision: String,
+    pub size_bytes: u64,
+    pub diagnostics: Vec<RuntimeDiagnostic>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WorkspaceProfileSourceTreeResponse {
+    pub workspace_id: String,
+    pub tree: WorkspaceProfileSourceTreeSummary,
+    pub files: Vec<WorkspaceProfileSourceTreeFileSummary>,
+    pub diagnostics: Vec<RuntimeDiagnostic>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WorkspaceProfileSourceTreeFileResponse {
+    pub workspace_id: String,
+    pub source_tree_id: String,
+    pub file: WorkspaceProfileSourceTreeFileSummary,
+    pub content: String,
+    pub diagnostics: Vec<RuntimeDiagnostic>,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct WorkspaceProfileSourceDetailResponse {
     pub workspace_id: String,
@@ -137,6 +180,28 @@ pub struct UpdateWorkspaceProfileSourceRequest {
     pub revision: String,
 }
 
+#[derive(Debug, Clone, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct WriteWorkspaceProfileTreeFileRequest {
+    pub path: String,
+    pub content: String,
+    #[serde(default)]
+    pub revision: Option<String>,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct DeleteWorkspaceProfileTreeFileRequest {
+    pub path: String,
+    pub revision: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct ReadWorkspaceProfileTreeFileQuery {
+    pub path: String,
+}
+
 #[derive(Debug, Clone, Deserialize)]
 #[serde(deny_unknown_fields)]
 pub struct DeleteWorkspaceProfileSourceRequest {
@@ -355,6 +420,7 @@ pub fn load_profile_settings(workspace_id: &str, workspace_root: &Path) -> Profi
         default_profile: registry.default,
         profiles,
         sources,
+        source_trees: vec![profile_source_tree_summary(workspace_root)],
         diagnostics,
     }
 }
@@ -580,6 +646,115 @@ pub fn delete_profile_source(
     })
 }
 
+pub fn read_profile_source_tree(
+    workspace_id: &str,
+    workspace_root: &Path,
+    source_tree_id: &str,
+) -> Result<WorkspaceProfileSourceTreeResponse> {
+    ensure_profile_source_tree_id(source_tree_id)?;
+    let files = list_profile_tree_files(workspace_root)?;
+    Ok(WorkspaceProfileSourceTreeResponse {
+        workspace_id: workspace_id.to_string(),
+        tree: profile_source_tree_summary_with_count(workspace_root, files.len()),
+        files,
+        diagnostics: Vec::new(),
+    })
+}
+
+pub fn read_profile_tree_file(
+    workspace_id: &str,
+    workspace_root: &Path,
+    source_tree_id: &str,
+    query: ReadWorkspaceProfileTreeFileQuery,
+) -> Result<WorkspaceProfileSourceTreeFileResponse> {
+    ensure_profile_source_tree_id(source_tree_id)?;
+    let relative_path = relative_source_path_for_virtual_path(&query.path)?;
+    let full = checked_source_path(workspace_root, &relative_path)?;
+    let metadata = source_metadata(&full)?;
+    if metadata.len() > MAX_PROFILE_SOURCE_BYTES {
+        return Err(profile_validation_error(
+            "profile_source_too_large",
+            "Profile source is too large for browser editing",
+        ));
+    }
+    let content = fs::read_to_string(&full)?;
+    Ok(WorkspaceProfileSourceTreeFileResponse {
+        workspace_id: workspace_id.to_string(),
+        source_tree_id: source_tree_id.to_string(),
+        file: summarize_tree_file(&full, display_source_path(&relative_path)),
+        content,
+        diagnostics: Vec::new(),
+    })
+}
+
+pub fn write_profile_tree_file(
+    workspace_id: &str,
+    workspace_root: &Path,
+    source_tree_id: &str,
+    request: WriteWorkspaceProfileTreeFileRequest,
+) -> Result<WorkspaceProfileSourceTreeFileResponse> {
+    ensure_profile_source_tree_id(source_tree_id)?;
+    if request.content.as_bytes().len() as u64 > MAX_PROFILE_SOURCE_BYTES {
+        return Err(profile_validation_error(
+            "profile_source_too_large",
+            "Profile source exceeds the browser editing size limit",
+        ));
+    }
+    let relative_path = relative_source_path_for_virtual_path(&request.path)?;
+    let full = workspace_root.join(&relative_path);
+    if let Some(parent) = full.parent() {
+        fs::create_dir_all(parent)?;
+    }
+    let full = checked_source_path(workspace_root, &relative_path)?;
+    if let Some(expected) = request.revision.as_deref() {
+        ensure_revision(&full, expected, "profile_source_revision_conflict")?;
+    } else if full.exists() {
+        return Err(profile_validation_error(
+            "profile_source_revision_required",
+            "Existing profile source edits require a revision token",
+        ));
+    }
+    validate_tree_content(workspace_root, &relative_path, &request.content)?;
+    fs::write(&full, &request.content)?;
+    Ok(WorkspaceProfileSourceTreeFileResponse {
+        workspace_id: workspace_id.to_string(),
+        source_tree_id: source_tree_id.to_string(),
+        file: summarize_tree_file(&full, display_source_path(&relative_path)),
+        content: request.content,
+        diagnostics: vec![diagnostic(
+            "profile_source_file_written",
+            DiagnosticSeverity::Info,
+            "Profile source file was written through the source tree API.",
+        )],
+    })
+}
+
+pub fn delete_profile_tree_file(
+    workspace_id: &str,
+    workspace_root: &Path,
+    source_tree_id: &str,
+    request: DeleteWorkspaceProfileTreeFileRequest,
+) -> Result<WorkspaceProfileSourceTreeResponse> {
+    ensure_profile_source_tree_id(source_tree_id)?;
+    let relative_path = relative_source_path_for_virtual_path(&request.path)?;
+    let full = checked_source_path(workspace_root, &relative_path)?;
+    ensure_revision(&full, &request.revision, "profile_source_revision_conflict")?;
+    let registry = read_registry(workspace_root).map_err(profile_registry_error)?;
+    if project_entries(&registry, &mut Vec::new())
+        .iter()
+        .any(|entry| entry.relative_path == relative_path)
+    {
+        return Err(profile_validation_error(
+            "profile_source_registered",
+            "Registered profile entry sources must be deleted through the profile registry API",
+        ));
+    }
+    if full.exists() {
+        fs::remove_file(full)?;
+    }
+    read_profile_source_tree(workspace_id, workspace_root, source_tree_id)
+}
+
 pub fn build_workspace_profile_archive(
     workspace_root: &Path,
     selector: &str,
@@ -588,43 +763,8 @@ pub fn build_workspace_profile_archive(
         return Ok(None);
     }
     let registry = read_registry(workspace_root).map_err(profile_registry_error)?;
-    let mut entrypoints = BTreeMap::new();
+    let sources = read_profile_source_tree_contents(workspace_root)?;
-    let mut sources = BTreeMap::new();
+    let (archive, _) = build_profile_archive_from_tree_sources(&registry, sources)?;
-    for entry in project_entries(&registry, &mut Vec::new()) {
-        let path = archive_path_for_entry(&entry.name);
-        let full = checked_source_path(workspace_root, &entry.relative_path)?;
-        let content = fs::read_to_string(&full)?;
-        sources.insert(path.clone(), content);
-        entrypoints.insert(project_selector(&entry.name), path);
-    }
-    if !entrypoints.contains_key(selector) {
-        return Err(Error::RuntimeOperationFailed {
-            runtime_id: "workspace-backend".to_string(),
-            code: "unknown_profile_selector".to_string(),
-            message: "Selected project profile is not present in the workspace profile registry"
-                .to_string(),
-        });
-    }
-    if let Some(default) = registry
-        .default
-        .as_deref()
-        .filter(|value| value.starts_with("project:"))
-    {
-        if let Some(path) = entrypoints.get(default).cloned() {
-            entrypoints.insert("default".to_string(), path);
-        }
-    }
-    let archive = ProfileSourceArchive::build(ProfileSourceArchiveInput {
-        id: "workspace-project-decodal-profiles-v1".to_string(),
-        entrypoints,
-        imports: BTreeMap::new(),
-        sources,
-    })
-    .map_err(|err| Error::RuntimeOperationFailed {
-        runtime_id: "workspace-backend".to_string(),
-        code: "profile_source_archive_invalid".to_string(),
-        message: err.to_string(),
-    })?;
     archive
         .verify()
         .and_then(|verified| {
@@ -845,6 +985,305 @@ fn validate_registry_default(registry: &ProfileRegistryDocument) -> Result<()> {
     ))
 }
 
+fn profile_source_tree_summary(workspace_root: &Path) -> WorkspaceProfileSourceTreeSummary {
+    let file_count = list_profile_tree_files(workspace_root)
+        .map(|files| files.len())
+        .unwrap_or(0);
+    profile_source_tree_summary_with_count(workspace_root, file_count)
+}
+
+fn profile_source_tree_summary_with_count(
+    workspace_root: &Path,
+    file_count: usize,
+) -> WorkspaceProfileSourceTreeSummary {
+    WorkspaceProfileSourceTreeSummary {
+        source_tree_id: PROFILE_SOURCE_TREE_ID.to_string(),
+        label: "Project profile sources".to_string(),
+        root_path: PROFILE_SOURCE_TREE_DISPLAY_ROOT.to_string(),
+        kind: "decodal_source_tree".to_string(),
+        editable: true,
+        revision: file_revision(&workspace_root.join(PROFILE_SOURCE_ROOT_RELATIVE_PATH)),
+        file_count,
+        diagnostics: Vec::new(),
+    }
+}
+
+fn ensure_profile_source_tree_id(source_tree_id: &str) -> Result<()> {
+    if source_tree_id == PROFILE_SOURCE_TREE_ID {
+        Ok(())
+    } else {
+        Err(Error::RuntimeOperationFailed {
+            runtime_id: "workspace-backend".to_string(),
+            code: "unknown_profile_source_tree".to_string(),
+            message: "Unknown profile source tree".to_string(),
+        })
+    }
+}
+
+fn list_profile_tree_files(
+    workspace_root: &Path,
+) -> Result<Vec<WorkspaceProfileSourceTreeFileSummary>> {
+    let mut files = Vec::new();
+    collect_profile_tree_files(
+        workspace_root,
+        &workspace_root.join(PROFILE_SOURCE_ROOT_RELATIVE_PATH),
+        &mut files,
+    )?;
+    files.sort_by(|a, b| a.path.cmp(&b.path));
+    Ok(files)
+}
+
+fn collect_profile_tree_files(
+    workspace_root: &Path,
+    dir: &Path,
+    files: &mut Vec<WorkspaceProfileSourceTreeFileSummary>,
+) -> Result<()> {
+    if !dir.exists() {
+        return Ok(());
+    }
+    for entry in fs::read_dir(dir)? {
+        let entry = entry?;
+        let path = entry.path();
+        let file_type = entry.file_type()?;
+        if file_type.is_dir() {
+            collect_profile_tree_files(workspace_root, &path, files)?;
+        } else if file_type.is_file()
+            && path.extension().and_then(|value| value.to_str()) == Some("dcdl")
+        {
+            let relative = path
+                .strip_prefix(workspace_root)
+                .map_err(|_| {
+                    profile_validation_error(
+                        "profile_source_path_invalid",
+                        "Profile source is outside workspace",
+                    )
+                })?
+                .to_path_buf();
+            files.push(summarize_tree_file(&path, display_source_path(&relative)));
+        }
+    }
+    Ok(())
+}
+
+fn summarize_tree_file(path: &Path, virtual_path: String) -> WorkspaceProfileSourceTreeFileSummary {
+    WorkspaceProfileSourceTreeFileSummary {
+        path: virtual_path,
+        kind: "decodal".to_string(),
+        editable: true,
+        revision: file_revision(path),
+        size_bytes: source_metadata(path)
+            .map(|metadata| metadata.len())
+            .unwrap_or(0),
+        diagnostics: Vec::new(),
+    }
+}
+
+fn relative_source_path_for_virtual_path(virtual_path: &str) -> Result<PathBuf> {
+    let normalized = normalize_virtual_profile_source_path(virtual_path)?;
+    let Some(rest) = normalized.strip_prefix("profiles/") else {
+        return Err(profile_validation_error(
+            "profile_source_path_invalid",
+            "Profile source paths must be under profiles/",
+        ));
+    };
+    if rest.is_empty() || !rest.ends_with(".dcdl") {
+        return Err(profile_validation_error(
+            "profile_source_path_invalid",
+            "Profile source files must use the .dcdl extension",
+        ));
+    }
+    Ok(Path::new(PROFILE_SOURCE_ROOT_RELATIVE_PATH).join(rest))
+}
+
+fn display_source_path(relative_path: &Path) -> String {
+    let profile_root = Path::new(PROFILE_SOURCE_ROOT_RELATIVE_PATH);
+    let relative = relative_path
+        .strip_prefix(profile_root)
+        .unwrap_or(relative_path);
+    let rest = relative.to_string_lossy().replace('\\', "/");
+    format!("{PROFILE_SOURCE_TREE_DISPLAY_ROOT}/{rest}")
+}
+
+fn normalize_virtual_profile_source_path(path: &str) -> Result<String> {
+    let path = path
+        .strip_prefix("project:")
+        .or_else(|| path.strip_prefix("workspace:"))
+        .unwrap_or(path);
+    if path.is_empty() || path.contains("://") || Path::new(path).is_absolute() {
+        return Err(profile_validation_error(
+            "profile_source_path_invalid",
+            "Profile source path must be a virtual relative path",
+        ));
+    }
+    let mut normalized = PathBuf::new();
+    for component in Path::new(path).components() {
+        match component {
+            Component::CurDir => {}
+            Component::Normal(value) => normalized.push(value),
+            Component::ParentDir | Component::RootDir | Component::Prefix(_) => {
+                return Err(profile_validation_error(
+                    "profile_source_path_invalid",
+                    "Profile source path must not escape the virtual source tree",
+                ));
+            }
+        }
+    }
+    let normalized = normalized.to_string_lossy().replace('\\', "/");
+    if normalized.is_empty() {
+        return Err(profile_validation_error(
+            "profile_source_path_invalid",
+            "Profile source path must not be empty",
+        ));
+    }
+    Ok(normalized)
+}
+
+fn read_profile_source_tree_contents(workspace_root: &Path) -> Result<BTreeMap<String, String>> {
+    let mut sources = BTreeMap::new();
+    for file in list_profile_tree_files(workspace_root)? {
+        let relative = relative_source_path_for_virtual_path(&file.path)?;
+        let full = checked_source_path(workspace_root, &relative)?;
+        sources.insert(file.path, fs::read_to_string(full)?);
+    }
+    Ok(sources)
+}
+
+fn build_profile_archive_from_tree_sources(
+    registry: &ProfileRegistryDocument,
+    mut sources: BTreeMap<String, String>,
+) -> Result<(ProfileSourceArchive, BTreeMap<String, String>)> {
+    let mut entrypoints = BTreeMap::new();
+    for entry in project_entries(registry, &mut Vec::new()) {
+        let path = display_source_path(&entry.relative_path);
+        if sources.contains_key(&path) {
+            entrypoints.insert(project_selector(&entry.name), path);
+        }
+    }
+    if let Some(default) = registry
+        .default
+        .as_deref()
+        .filter(|value| value.starts_with("project:"))
+    {
+        if let Some(path) = entrypoints.get(default).cloned() {
+            entrypoints.insert("default".to_string(), path);
+        }
+    }
+    let mut imports = BTreeMap::new();
+    let source_snapshot = sources.clone();
+    for (current_path, content) in &source_snapshot {
+        for specifier in collect_decodal_import_specifiers(content) {
+            let target = resolve_profile_source_import(current_path, &specifier)?;
+            if source_snapshot.contains_key(&target) {
+                imports.insert(format!("{current_path}\0{specifier}"), target);
+            } else {
+                return Err(profile_validation_error(
+                    "profile_source_import_missing",
+                    &format!(
+                        "Profile source import {specifier:?} from {current_path} resolves to missing {target}"
+                    ),
+                ));
+            }
+        }
+    }
+    if sources.is_empty() {
+        sources.insert("profiles/.empty.dcdl".to_string(), "{}".to_string());
+    }
+    ProfileSourceArchive::build(ProfileSourceArchiveInput {
+        id: "workspace-project-decodal-profiles-v1".to_string(),
+        entrypoints,
+        imports: imports.clone(),
+        sources,
+    })
+    .map(|archive| (archive, imports))
+    .map_err(|err| Error::RuntimeOperationFailed {
+        runtime_id: "workspace-backend".to_string(),
+        code: "profile_source_archive_invalid".to_string(),
+        message: err.to_string(),
+    })
+}
+
+fn resolve_profile_source_import(current_path: &str, specifier: &str) -> Result<String> {
+    if specifier.is_empty() || specifier.contains("://") || Path::new(specifier).is_absolute() {
+        return Err(profile_validation_error(
+            "profile_source_import_invalid",
+            "Profile source import must be a virtual relative path",
+        ));
+    }
+    let raw = specifier
+        .strip_prefix("project:")
+        .or_else(|| specifier.strip_prefix("workspace:"))
+        .unwrap_or(specifier);
+    if specifier.contains(':') && raw == specifier {
+        return Err(profile_validation_error(
+            "profile_source_import_invalid",
+            "Unsupported profile source import namespace",
+        ));
+    }
+    let base = if raw.starts_with("profiles/") || raw.starts_with("./profiles/") {
+        PathBuf::from(raw)
+    } else {
+        Path::new(current_path)
+            .parent()
+            .map(Path::to_path_buf)
+            .unwrap_or_default()
+            .join(raw)
+    };
+    let normalized = normalize_virtual_profile_source_path(&base.to_string_lossy())?;
+    if !normalized.starts_with("profiles/") {
+        return Err(profile_validation_error(
+            "profile_source_import_invalid",
+            "Profile source import must resolve inside the profiles/ tree",
+        ));
+    }
+    Ok(normalized)
+}
+
+fn collect_decodal_import_specifiers(content: &str) -> Vec<String> {
+    let mut specifiers = Vec::new();
+    for line in content.lines() {
+        let trimmed = line.trim_start();
+        if trimmed.starts_with("//") || trimmed.starts_with('#') {
+            continue;
+        }
+        let Some(index) = trimmed.find("import") else {
+            continue;
+        };
+        let after = trimmed[index + "import".len()..].trim_start();
+        let Some(first) = after.chars().next() else {
+            continue;
+        };
+        if first == '"' || first == '\'' {
+            if let Some(end) = after[1..].find(first) {
+                specifiers.push(after[1..1 + end].to_string());
+            }
+        } else {
+            let ident: String = after
+                .chars()
+                .take_while(|ch| !ch.is_whitespace() && *ch != ';' && *ch != ',' && *ch != '{')
+                .collect();
+            if !ident.is_empty() {
+                specifiers.push(ident);
+            }
+        }
+    }
+    specifiers
+}
+
+fn validate_tree_content(workspace_root: &Path, relative_path: &Path, content: &str) -> Result<()> {
+    let mut sources = read_profile_source_tree_contents(workspace_root)?;
+    sources.insert(display_source_path(relative_path), content.to_string());
+    let registry = read_registry(workspace_root).map_err(profile_registry_error)?;
+    let (archive, _) = build_profile_archive_from_tree_sources(&registry, sources)?;
+    archive
+        .verify()
+        .map_err(|err| Error::RuntimeOperationFailed {
+            runtime_id: "workspace-backend".to_string(),
+            code: "profile_source_invalid".to_string(),
+            message: err.to_string(),
+        })?;
+    Ok(())
+}
+
 fn validate_source_content(
     workspace_root: &Path,
     name: &str,
@@ -858,24 +1297,18 @@ fn validate_source_content(
             message: "Profile source exceeds the browser editing size limit".to_string(),
         });
     }
-    let archive_path = archive_path_for_entry(name);
+    checked_source_path(workspace_root, relative_path)?;
+    let mut sources = read_profile_source_tree_contents(workspace_root)?;
+    sources.insert(display_source_path(relative_path), content.to_string());
+    let mut registry = read_registry(workspace_root).map_err(profile_registry_error)?;
+    registry.profile.entry(name.to_string()).or_insert_with(|| {
+        ProfileEntryFile::Table(ProfileEntryTable {
+            path: display_source_path(relative_path),
+            description: None,
+        })
+    });
     let selector = project_selector(name);
-    let mut entrypoints = BTreeMap::new();
+    let (archive, _) = build_profile_archive_from_tree_sources(&registry, sources)?;
-    entrypoints.insert(selector.clone(), archive_path.clone());
-    entrypoints.insert("default".to_string(), archive_path.clone());
-    let mut sources = BTreeMap::new();
-    sources.insert(archive_path, content.to_string());
-    let archive = ProfileSourceArchive::build(ProfileSourceArchiveInput {
-        id: format!("workspace-profile-validation-{name}"),
-        entrypoints,
-        imports: BTreeMap::new(),
-        sources,
-    })
-    .map_err(|err| Error::RuntimeOperationFailed {
-        runtime_id: "workspace-backend".to_string(),
-        code: "profile_source_archive_invalid".to_string(),
-        message: err.to_string(),
-    })?;
     let verified = archive
         .verify()
         .map_err(|err| Error::RuntimeOperationFailed {
@@ -883,7 +1316,6 @@ fn validate_source_content(
             code: "profile_source_archive_invalid".to_string(),
             message: err.to_string(),
         })?;
-    checked_source_path(workspace_root, relative_path)?;
     verified
         .resolve_profile(&selector, workspace_root, "workspace-settings-validation")
         .map_err(|err| Error::RuntimeOperationFailed {
@@ -1179,18 +1611,6 @@ pub fn selector_for_builtin_candidate(
     }
 }
 
-fn archive_path_for_entry(name: &str) -> String {
-    format!("profiles/{name}.dcdl")
-}
-
-fn display_source_path(relative_path: &Path) -> String {
-    relative_path
-        .strip_prefix(".yoi")
-        .unwrap_or(relative_path)
-        .to_string_lossy()
-        .replace('\\', "/")
-}
-
 fn registry_path(workspace_root: &Path) -> PathBuf {
     workspace_root.join(PROFILE_REGISTRY_RELATIVE_PATH)
 }

crates/workspace-server/src/server.rs

@@ -38,8 +38,9 @@ use crate::observation::{
 };
 use crate::profile_settings::{
     CreateWorkspaceProfileSourceRequest, DeleteWorkspaceProfileSourceRequest,
+    DeleteWorkspaceProfileTreeFileRequest, ReadWorkspaceProfileTreeFileQuery,
     UpdateWorkspaceMetadataRequest, UpdateWorkspaceProfileRegistryRequest,
-    UpdateWorkspaceProfileSourceRequest,
+    UpdateWorkspaceProfileSourceRequest, WriteWorkspaceProfileTreeFileRequest,
 };
 use crate::records::{
     LocalProjectRecordReader, ObjectiveDetail, ProjectRecordList, TicketDetail, TicketSummary,
@@ -281,6 +282,16 @@ pub fn build_router(api: WorkspaceApi) -> Router {
             "/api/w/{workspace_id}/settings/profiles/registry",
             put(scoped_update_profile_registry),
         )
+        .route(
+            "/api/w/{workspace_id}/settings/profiles/trees/{source_tree_id}",
+            get(scoped_get_profile_source_tree),
+        )
+        .route(
+            "/api/w/{workspace_id}/settings/profiles/trees/{source_tree_id}/file",
+            get(scoped_get_profile_tree_file)
+                .put(scoped_write_profile_tree_file)
+                .delete(scoped_delete_profile_tree_file),
+        )
         .route(
             "/api/w/{workspace_id}/settings/profiles/{profile_source_id}",
             get(scoped_get_profile_source)
@@ -907,6 +918,60 @@ async fn scoped_update_profile_registry(
     )?))
 }
 
+async fn scoped_get_profile_source_tree(
+    State(api): State<WorkspaceApi>,
+    AxumPath((workspace_id, source_tree_id)): AxumPath<(String, String)>,
+) -> ApiResult<Json<crate::profile_settings::WorkspaceProfileSourceTreeResponse>> {
+    validate_workspace_scope(&api, &workspace_id)?;
+    Ok(Json(crate::profile_settings::read_profile_source_tree(
+        &workspace_id,
+        &api.config.workspace_root,
+        &source_tree_id,
+    )?))
+}
+
+async fn scoped_get_profile_tree_file(
+    State(api): State<WorkspaceApi>,
+    AxumPath((workspace_id, source_tree_id)): AxumPath<(String, String)>,
+    Query(query): Query<ReadWorkspaceProfileTreeFileQuery>,
+) -> ApiResult<Json<crate::profile_settings::WorkspaceProfileSourceTreeFileResponse>> {
+    validate_workspace_scope(&api, &workspace_id)?;
+    Ok(Json(crate::profile_settings::read_profile_tree_file(
+        &workspace_id,
+        &api.config.workspace_root,
+        &source_tree_id,
+        query,
+    )?))
+}
+
+async fn scoped_write_profile_tree_file(
+    State(api): State<WorkspaceApi>,
+    AxumPath((workspace_id, source_tree_id)): AxumPath<(String, String)>,
+    Json(request): Json<WriteWorkspaceProfileTreeFileRequest>,
+) -> ApiResult<Json<crate::profile_settings::WorkspaceProfileSourceTreeFileResponse>> {
+    validate_workspace_scope(&api, &workspace_id)?;
+    Ok(Json(crate::profile_settings::write_profile_tree_file(
+        &workspace_id,
+        &api.config.workspace_root,
+        &source_tree_id,
+        request,
+    )?))
+}
+
+async fn scoped_delete_profile_tree_file(
+    State(api): State<WorkspaceApi>,
+    AxumPath((workspace_id, source_tree_id)): AxumPath<(String, String)>,
+    Json(request): Json<DeleteWorkspaceProfileTreeFileRequest>,
+) -> ApiResult<Json<crate::profile_settings::WorkspaceProfileSourceTreeResponse>> {
+    validate_workspace_scope(&api, &workspace_id)?;
+    Ok(Json(crate::profile_settings::delete_profile_tree_file(
+        &workspace_id,
+        &api.config.workspace_root,
+        &source_tree_id,
+        request,
+    )?))
+}
+
 async fn scoped_get_profile_source(
     State(api): State<WorkspaceApi>,
     AxumPath((workspace_id, profile_source_id)): AxumPath<(String, String)>,

web/workspace/deno.json

@@ -15,6 +15,8 @@
     "@sveltejs/adapter-static": "npm:@sveltejs/adapter-static@3.0.9",
     "@sveltejs/kit": "npm:@sveltejs/kit@2.49.4",
     "@sveltejs/vite-plugin-svelte": "npm:@sveltejs/vite-plugin-svelte@6.2.1",
+    "@codemirror/state": "npm:@codemirror/state@6.5.2",
+    "@codemirror/view": "npm:@codemirror/view@6.38.8",
     "clsx": "npm:clsx@2.1.1",
     "cookie": "npm:cookie@0.6.0",
     "devalue": "npm:devalue@5.6.4",

web/workspace/deno.lock

@@ -1,6 +1,8 @@
 {
   "version": "5",
   "specifiers": {
+    "npm:@codemirror/state@6.5.2": "6.5.2",
+    "npm:@codemirror/view@6.38.8": "6.38.8",
     "npm:@sveltejs/adapter-static@3.0.9": "3.0.9_@sveltejs+kit@2.49.4__@sveltejs+vite-plugin-svelte@6.2.1___svelte@5.45.6___vite@7.2.7__svelte@5.45.6__typescript@5.9.3__vite@7.2.7_@sveltejs+vite-plugin-svelte@6.2.1__svelte@5.45.6__vite@7.2.7_svelte@5.45.6_typescript@5.9.3_vite@7.2.7",
     "npm:@sveltejs/kit@2.49.4": "2.49.4_@sveltejs+vite-plugin-svelte@6.2.1__svelte@5.45.6__vite@7.2.7_svelte@5.45.6_typescript@5.9.3_vite@7.2.7",
     "npm:@sveltejs/vite-plugin-svelte@6.2.1": "6.2.1_svelte@5.45.6_vite@7.2.7",
@@ -14,6 +16,21 @@
     "npm:vite@7.2.7": "7.2.7"
   },
   "npm": {
+    "@codemirror/state@6.5.2": {
+      "integrity": "sha512-FVqsPqtPWKVVL3dPSxy8wEF/ymIEuVzF1PK3VbUgrxXpJUSHQWWZz4JMToquRxnkw+36LTamCZG2iua2Ptq0fA==",
+      "dependencies": [
+        "@marijn/find-cluster-break"
+      ]
+    },
+    "@codemirror/view@6.38.8": {
+      "integrity": "sha512-XcE9fcnkHCbWkjeKyi0lllwXmBLtyYb5dt89dJyx23I9+LSh5vZDIuk7OLG4VM1lgrXZQcY6cxyZyk5WVPRv/A==",
+      "dependencies": [
+        "@codemirror/state",
+        "crelt",
+        "style-mod",
+        "w3c-keyname"
+      ]
+    },
     "@esbuild/aix-ppc64@0.25.12": {
       "integrity": "sha512-Hhmwd6CInZ3dwpuGTF8fJG6yoWmsToE+vYgD4nytZVxcu1ulHpUQRAB1UJ8+N1Am3Mz4+xOByoQoSZf4D+CpkA==",
       "os": ["aix"],
@@ -171,6 +188,9 @@
         "@jridgewell/sourcemap-codec"
       ]
     },
+    "@marijn/find-cluster-break@1.0.3": {
+      "integrity": "sha512-FY+MKLBoTsLNJF/eLWaOsXGdz6uh3Iu1axjPf6TUq92IYumcTcXWHoS747JARLkcdlJ/Waiaxc5wQfFO8jC6NA=="
+    },
     "@polka/url@1.0.0-next.29": {
       "integrity": "sha512-wwQAWhWSuHaag8c4q/KN/vCoeOJYshAIvMQwD4GpSb3OiZklFfvAgmj0VCBBImRpuF/aFgIRzllXlVX93Jevww=="
     },
@@ -392,6 +412,9 @@
     "cookie@0.6.0": {
       "integrity": "sha512-U71cyTamuh1CRNCfpGY6to28lxvNwPG4Guz/EVjgf3Jmzv0vlDp1atT9eS5dDjMYHucpHbWns6Lwf3BKz6svdw=="
     },
+    "crelt@1.0.7": {
+      "integrity": "sha512-aK6BbWfhf4U/wCcLHKPJl/xa6VkVstRaPywWtMKGwuOLc/wZTyQYuoxgvZnNsBvv7Kg3YTBQYYBCggcviQczuA=="
+    },
     "debug@4.4.3": {
       "integrity": "sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==",
       "dependencies": [
@@ -567,6 +590,9 @@
     "source-map-js@1.2.1": {
       "integrity": "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA=="
     },
+    "style-mod@4.1.3": {
+      "integrity": "sha512-i/n8VsZydrugj3Iuzll8+x/00GH2vnYsk1eomD8QiRrSAeW6ItbCQDtfXCeJHd0iwiNagqjQkvpvREEPtW3IoQ=="
+    },
     "svelte-check@4.3.4_svelte@5.45.6_typescript@5.9.3": {
       "integrity": "sha512-DVWvxhBrDsd+0hHWKfjP99lsSXASeOhHJYyuKOFYJcP7ThfSCKgjVarE8XfuMWpS5JV3AlDf+iK1YGGo2TACdw==",
       "dependencies": [
@@ -638,12 +664,17 @@
         "vite"
       ]
     },
+    "w3c-keyname@2.2.8": {
+      "integrity": "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ=="
+    },
     "zimmerframe@1.1.4": {
       "integrity": "sha512-B58NGBEoc8Y9MWWCQGl/gq9xBCe4IiKM0a2x7GZdQKOW5Exr8S1W24J6OgM1njK8xCRGvAJIL/MxXHf6SkmQKQ=="
     }
   },
   "workspace": {
     "dependencies": [
+      "npm:@codemirror/state@6.5.2",
+      "npm:@codemirror/view@6.38.8",
       "npm:@sveltejs/adapter-static@3.0.9",
       "npm:@sveltejs/kit@2.49.4",
       "npm:@sveltejs/vite-plugin-svelte@6.2.1",

web/workspace/src/lib/workspace-settings/DecodalSourceEditor.svelte

@@ -0,0 +1,71 @@
+<script lang="ts">
+  import { EditorState } from '@codemirror/state';
+  import { EditorView, keymap, lineNumbers, highlightActiveLine, drawSelection } from '@codemirror/view';
+
+  let {
+    value = '',
+    readonly = false,
+    ariaLabel = 'Decodal source',
+    onChange = (_value: string) => {},
+  }: {
+    value?: string;
+    readonly?: boolean;
+    ariaLabel?: string;
+    onChange?: (value: string) => void;
+  } = $props();
+
+  let host = $state<HTMLDivElement | null>(null);
+  let view = $state<EditorView | null>(null);
+
+  const theme = EditorView.theme({
+    '&': {
+      border: '1px solid var(--border-subtle)',
+      borderRadius: '0.75rem',
+      minHeight: '24rem',
+      background: 'var(--surface-2)',
+      color: 'var(--text-primary)',
+      fontSize: '0.9rem',
+    },
+    '.cm-scroller': { fontFamily: 'var(--font-mono)', minHeight: '24rem' },
+    '.cm-content': { padding: '0.75rem 0' },
+    '.cm-gutters': { background: 'var(--surface-2)', color: 'var(--text-muted)' },
+    '.cm-activeLine': { backgroundColor: 'rgba(125, 211, 252, 0.08)' },
+  });
+
+  $effect(() => {
+    if (!host || view) return;
+    const editor = new EditorView({
+      parent: host,
+      state: EditorState.create({
+        doc: value,
+        extensions: [
+          lineNumbers(),
+          drawSelection(),
+          highlightActiveLine(),
+          keymap.of([]),
+          EditorState.readOnly.of(readonly),
+          EditorView.editable.of(!readonly),
+          EditorView.updateListener.of((update) => {
+            if (update.docChanged) onChange(update.state.doc.toString());
+          }),
+          theme,
+        ],
+      }),
+    });
+    view = editor;
+    return () => {
+      editor.destroy();
+      view = null;
+    };
+  });
+
+  $effect(() => {
+    if (!view) return;
+    const current = view.state.doc.toString();
+    if (current !== value) {
+      view.dispatch({ changes: { from: 0, to: current.length, insert: value } });
+    }
+  });
+</script>
+
+<div bind:this={host} role="textbox" aria-label={ariaLabel} aria-readonly={readonly}></div>

web/workspace/src/lib/workspace-settings/profile-api.ts

@@ -8,6 +8,8 @@ import type {
   WorkspaceMetadataMutationResponse,
   WorkspaceMetadataSettingsResponse,
   WorkspaceProfileSourceDetailResponse,
+  WorkspaceProfileSourceTreeFileResponse,
+  WorkspaceProfileSourceTreeResponse,
 } from "./profile-types";
 
 export function fetchWorkspaceMetadataSettings(
@@ -116,3 +118,44 @@ export function deleteProfileSource(
     { method: "DELETE", body: JSON.stringify(request) },
   );
 }
+
+export function fetchProfileSourceTree(
+  workspaceId: string,
+  sourceTreeId: string,
+): Promise<WorkspaceProfileSourceTreeResponse> {
+  return workspaceApiJson(
+    `/api/w/${encodeURIComponent(workspaceId)}/settings/profiles/trees/${encodeURIComponent(sourceTreeId)}`,
+  );
+}
+
+export function fetchProfileTreeFile(
+  workspaceId: string,
+  sourceTreeId: string,
+  path: string,
+): Promise<WorkspaceProfileSourceTreeFileResponse> {
+  return workspaceApiJson(
+    `/api/w/${encodeURIComponent(workspaceId)}/settings/profiles/trees/${encodeURIComponent(sourceTreeId)}/file?path=${encodeURIComponent(path)}`,
+  );
+}
+
+export function writeProfileTreeFile(
+  workspaceId: string,
+  sourceTreeId: string,
+  request: { path: string; content: string; revision?: string | null },
+): Promise<WorkspaceProfileSourceTreeFileResponse> {
+  return workspaceApiJsonWithBody(
+    `/api/w/${encodeURIComponent(workspaceId)}/settings/profiles/trees/${encodeURIComponent(sourceTreeId)}/file`,
+    { method: "PUT", body: JSON.stringify(request) },
+  );
+}
+
+export function deleteProfileTreeFile(
+  workspaceId: string,
+  sourceTreeId: string,
+  request: { path: string; revision: string },
+): Promise<WorkspaceProfileSourceTreeResponse> {
+  return workspaceApiJsonWithBody(
+    `/api/w/${encodeURIComponent(workspaceId)}/settings/profiles/trees/${encodeURIComponent(sourceTreeId)}/file`,
+    { method: "DELETE", body: JSON.stringify(request) },
+  );
+}

web/workspace/src/lib/workspace-settings/profile-types.ts

@@ -42,6 +42,7 @@ export type ProfileSettingsResponse = {
   default_profile?: string | null;
   profiles: WorkspaceProfileSummary[];
   sources: WorkspaceProfileSourceSummary[];
+  source_trees: WorkspaceProfileSourceTreeSummary[];
   diagnostics: Diagnostic[];
 };
 
@@ -58,3 +59,38 @@ export type ProfileSettingsMutationResponse = {
   settings: ProfileSettingsResponse;
   diagnostics: Diagnostic[];
 };
+
+export type WorkspaceProfileSourceTreeSummary = {
+  source_tree_id: string;
+  label: string;
+  root_path: string;
+  kind: "decodal_source_tree" | string;
+  editable: boolean;
+  revision: string;
+  file_count: number;
+  diagnostics: Diagnostic[];
+};
+
+export type WorkspaceProfileSourceTreeFileSummary = {
+  path: string;
+  kind: "decodal" | string;
+  editable: boolean;
+  revision: string;
+  size_bytes: number;
+  diagnostics: Diagnostic[];
+};
+
+export type WorkspaceProfileSourceTreeResponse = {
+  workspace_id: string;
+  tree: WorkspaceProfileSourceTreeSummary;
+  files: WorkspaceProfileSourceTreeFileSummary[];
+  diagnostics: Diagnostic[];
+};
+
+export type WorkspaceProfileSourceTreeFileResponse = {
+  workspace_id: string;
+  source_tree_id: string;
+  file: WorkspaceProfileSourceTreeFileSummary;
+  content: string;
+  diagnostics: Diagnostic[];
+};

web/workspace/src/routes/w/[workspaceId]/settings/profiles/+page.svelte

@@ -1,40 +1,88 @@
 <script lang="ts">
   import DiagnosticsList from '$lib/workspace-settings/DiagnosticsList.svelte';
-  import { fetchProfileSettings } from '$lib/workspace-settings/profile-api';
+  import DecodalSourceEditor from '$lib/workspace-settings/DecodalSourceEditor.svelte';
+  import {
+    fetchProfileSettings,
+    fetchProfileSourceTree,
+    fetchProfileTreeFile,
+    writeProfileTreeFile,
+  } from '$lib/workspace-settings/profile-api';
   import type { Diagnostic } from '$lib/workspace-settings/model';
-  import type { ProfileSettingsResponse } from '$lib/workspace-settings/profile-types';
+  import type {
+    ProfileSettingsResponse,
+    WorkspaceProfileSourceTreeFileResponse,
+    WorkspaceProfileSourceTreeResponse,
+  } from '$lib/workspace-settings/profile-types';
   import type { PageProps } from './$types';
 
   let { data }: PageProps = $props();
   let workspaceId = $derived(data.workspace?.workspace_id ?? '');
 
   let profileSettings = $state<ProfileSettingsResponse | null>(null);
+  let sourceTree = $state<WorkspaceProfileSourceTreeResponse | null>(null);
+  let selectedFile = $state<WorkspaceProfileSourceTreeFileResponse | null>(null);
+  let draftContent = $state('');
   let loading = $state(true);
+  let saving = $state(false);
   let message = $state<string | null>(null);
   let diagnostics = $state<Diagnostic[]>([]);
 
-  $effect(() => {
+  async function loadSettings() {
-    if (!workspaceId) {
+    if (!workspaceId) return;
+    loading = true;
+    message = null;
+    try {
+      const response = await fetchProfileSettings(workspaceId);
+      profileSettings = response;
+      diagnostics = response.diagnostics;
+      const treeId = response.source_trees[0]?.source_tree_id;
+      if (treeId) {
+        sourceTree = await fetchProfileSourceTree(workspaceId, treeId);
+        const firstPath = sourceTree.files[0]?.path;
+        if (firstPath) await selectTreeFile(treeId, firstPath);
+      }
+    } catch (err) {
+      message = err instanceof Error ? err.message : 'profile settings request failed';
+    } finally {
       loading = false;
-      return;
     }
+  }
+
+  async function selectTreeFile(sourceTreeId: string, path: string) {
+    selectedFile = await fetchProfileTreeFile(workspaceId, sourceTreeId, path);
+    draftContent = selectedFile.content;
+    diagnostics = selectedFile.diagnostics;
+  }
+
+  async function saveSelectedFile() {
+    if (!selectedFile) return;
+    saving = true;
+    message = null;
+    try {
+      selectedFile = await writeProfileTreeFile(workspaceId, selectedFile.source_tree_id, {
+        path: selectedFile.file.path,
+        revision: selectedFile.file.revision,
+        content: draftContent,
+      });
+      draftContent = selectedFile.content;
+      sourceTree = await fetchProfileSourceTree(workspaceId, selectedFile.source_tree_id);
+      diagnostics = selectedFile.diagnostics;
+      message = 'Saved Decodal profile source.';
+    } catch (err) {
+      message = err instanceof Error ? err.message : 'profile source save failed';
+    } finally {
+      saving = false;
+    }
+  }
+
+  $effect(() => {
     let cancelled = false;
     async function load() {
-      loading = true;
+      await loadSettings();
-      message = null;
+      if (cancelled) return;
-      try {
-        const response = await fetchProfileSettings(workspaceId);
-        if (!cancelled) {
-          profileSettings = response;
-          diagnostics = response.diagnostics;
-        }
-      } catch (err) {
-        if (!cancelled) message = err instanceof Error ? err.message : 'profile settings request failed';
-      } finally {
-        if (!cancelled) loading = false;
-      }
     }
-    load();
+    if (workspaceId) load();
+    else loading = false;
     return () => {
       cancelled = true;
     };
@@ -48,13 +96,13 @@
 <section class="card settings-section" aria-labelledby="profile-sources-title">
   <header class="settings-section-header">
     <div>
-      <p class="eyebrow">read-only</p>
+      <p class="eyebrow">Backend-owned source tree</p>
       <h2 id="profile-sources-title">Profiles</h2>
     </div>
-    <span class="badge warning">editing pending</span>
+    <span class="badge">Decodal editor</span>
   </header>
   <p>
-    Review the effective launch profiles and their source files. Editing is intentionally deferred until the Decodal profile source model is settled.
+    Review effective launch profiles and edit Decodal source files through virtual profile-tree paths. The browser receives only safe relative paths and revision tokens.
   </p>
 
   {#if loading}
@@ -77,24 +125,46 @@
         </ul>
       </article>
       <article>
-        <h3>Profile source files</h3>
+        <h3>Profile source tree</h3>
-        <p class="settings-note">Decodal source files that define or contribute to launch profiles.</p>
+        <p class="settings-note">Virtual Decodal paths exposed by the Backend-owned source tree.</p>
-        <ul class="settings-profile-list">
+        {#if sourceTree}
-          {#each profileSettings.sources as source (source.profile_source_id)}
+          <small>{sourceTree.tree.root_path} · {sourceTree.tree.file_count} files · rev {sourceTree.tree.revision}</small>
-            <li>
+          <ul class="settings-profile-list">
-              <strong>{source.display_path}</strong>
+            {#each sourceTree.files as file (file.path)}
-              <span>{source.kind} · {source.size_bytes} bytes</span>
+              <li>
-              <small>{source.editable ? 'editable later' : 'read-only'} · rev {source.revision}</small>
+                <button class="link-button" type="button" onclick={() => selectTreeFile(sourceTree!.tree.source_tree_id, file.path)}>
-              <DiagnosticsList diagnostics={source.diagnostics} />
+                  <strong>{file.path}</strong>
-            </li>
+                </button>
-          {/each}
+                <span>{file.kind} · {file.size_bytes} bytes</span>
-        </ul>
+                <small>{file.editable ? 'editable' : 'read-only'} · rev {file.revision}</small>
+                <DiagnosticsList diagnostics={file.diagnostics} />
+              </li>
+            {/each}
+          </ul>
+        {:else}
+          <p class="settings-note">No project profile source tree is available.</p>
+        {/if}
       </article>
     </div>
+
+    {#if selectedFile}
+      <article class="settings-editor-panel">
+        <header class="settings-section-header">
+          <div>
+            <p class="eyebrow">{selectedFile.source_tree_id}</p>
+            <h3>{selectedFile.file.path}</h3>
+          </div>
+          <button type="button" disabled={saving || draftContent === selectedFile.content} onclick={saveSelectedFile}>
+            {saving ? 'Saving…' : 'Save'}
+          </button>
+        </header>
+        <DecodalSourceEditor value={draftContent} onChange={(value) => (draftContent = value)} ariaLabel={`Decodal source ${selectedFile.file.path}`} />
+      </article>
+    {/if}
   {/if}
 
   {#if message}
-    <p class="status-message" class:error={message.includes('failed')}>{message}</p>
+    <p class="status-message" class:error={message.includes('failed') || message.includes('error')}>{message}</p>
   {/if}
   <DiagnosticsList {diagnostics} />
 </section>