File System

OpenViking provides Unix-like file system operations for managing context.

WebDAV (Phase 1)

OpenViking Server also exposes a minimal WebDAV adapter for resource files:

text

/webdav/resources

Phase 1 intentionally keeps the scope narrow:

Resources only. Memories, skills, sessions, and other namespaces are not exposed.
Text-first writes. PUT currently accepts UTF-8 text content only.
WebDAV subset only. OPTIONS, PROPFIND, GET, HEAD, PUT, DELETE, MKCOL, and MOVE are supported.
Semantic sidecars stay internal. Derived files such as .abstract.md, .overview.md, .relations.json, and .path.ovlock are hidden from listings and cannot be accessed directly through WebDAV.

Behavior notes:

Creating a new file through WebDAV triggers OpenViking semantic generation for that file path.
Replacing an existing file through WebDAV refreshes related semantics and vectors, same as write().
User-created dot-directories and dot-files remain visible unless they match one of the reserved internal filenames above.

API Reference

abstract()

Read L0 abstract (~100 tokens summary).

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI (must be a directory)

Python SDK (Embedded / HTTP)

python

abstract = client.abstract("viking://resources/docs/")
print(f"Abstract: {abstract}")
# Output: "Documentation for the project API, covering authentication, endpoints..."

HTTP API

GET /api/v1/content/abstract?uri={uri}

bash

curl -X GET "http://localhost:1933/api/v1/content/abstract?uri=viking://resources/docs/" \
  -H "X-API-Key: your-key"

CLI

bash

openviking abstract viking://resources/docs/

Response

json

{
  "status": "ok",
  "result": "Documentation for the project API, covering authentication, endpoints...",
  "time": 0.1
}

overview()

Read L1 overview, applies to directories.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI (must be a directory)

Python SDK (Embedded / HTTP)

python

overview = client.overview("viking://resources/docs/")
print(f"Overview:\n{overview}")

HTTP API

GET /api/v1/content/overview?uri={uri}

bash

curl -X GET "http://localhost:1933/api/v1/content/overview?uri=viking://resources/docs/" \
  -H "X-API-Key: your-key"

CLI

bash

openviking overview viking://resources/docs/

Response

json

{
  "status": "ok",
  "result": "## docs/\n\nContains API documentation and guides...",
  "time": 0.1
}

read()

Read L2 full content.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI
offset	int	No	0	Starting line number (0-indexed)
limit	int	No	-1	Number of lines to read, `-1` means read to end

Notes

read() accepts file URIs only. Passing an existing directory URI returns INVALID_ARGUMENT (400), not NOT_FOUND.
Public URI parameters accept resources, user, agent, and session scopes. Internal scopes such as temp and queue return INVALID_URI.

Python SDK (Embedded / HTTP)

python

content = client.read("viking://resources/docs/api.md")
print(f"Content:\n{content}")

HTTP API

GET /api/v1/content/read?uri={uri}

bash

curl -X GET "http://localhost:1933/api/v1/content/read?uri=viking://resources/docs/api.md" \
  -H "X-API-Key: your-key"

CLI

bash

openviking read viking://resources/docs/api.md

Response

json

{
  "status": "ok",
  "result": "# API Documentation\n\nFull content of the file...",
  "time": 0.1
}

write()

Update an existing file, or create a new one when mode="create", and automatically refresh related semantics and vectors.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Existing file URI
content	str	Yes	-	New content to write
mode	str	No	`replace`	`replace`, `append`, or `create`
wait	bool	No	`false`	Wait for background semantic/vector refresh
timeout	float	No	`null`	Timeout in seconds when `wait=true`

Notes

replace and append require the file to exist; create targets a new file and returns 409 Conflict when the path already exists. Directories are always rejected.
create only accepts text-writable extensions: .md, .txt, .json, .yaml, .yml, .toml, .py, .js, .ts. Parent directories are created automatically.
Derived semantic files cannot be written directly: .abstract.md, .overview.md, .relations.json.
File content is updated before the API returns. wait only controls whether the call waits for semantic/vector refresh to finish.
The public API no longer accepts regenerate_semantics or revectorize; write always refreshes related semantics and vectors.

Python SDK (Embedded / HTTP)

python

result = client.write(
    "viking://resources/docs/api.md",
    "# Updated API\n\nFresh content.",
    mode="replace",
    wait=True,
)
print(result["root_uri"])

HTTP API

POST /api/v1/content/write

bash

curl -X POST "http://localhost:1933/api/v1/content/write" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-key" \
  -d '{
    "uri": "viking://resources/docs/api.md",
    "content": "# Updated API\n\nFresh content.",
    "mode": "replace",
    "wait": true
  }'

CLI

bash

openviking write viking://resources/docs/api.md \
  --content "# Updated API\n\nFresh content." \
  --wait

Response

json

{
  "status": "ok",
  "result": {
    "uri": "viking://resources/docs/api.md",
    "root_uri": "viking://resources/docs",
    "context_type": "resource",
    "mode": "replace",
    "written_bytes": 29,
    "content_updated": true,
    "semantic_status": "complete",
    "vector_status": "complete",
    "queue_status": {
      "Semantic": {
        "processed": 1,
        "error_count": 0,
        "errors": []
      },
      "Embedding": {
        "processed": 2,
        "error_count": 0,
        "errors": []
      }
    }
  }
}

ls()

List directory contents.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI
simple	bool	No	False	Return only relative paths
recursive	bool	No	False	List all subdirectories recursively
output	str	No	`agent`	Output format: `agent` or `original`
abs_limit	int	No	256	Abstract length limit for `agent` output
show_all_hidden	bool	No	False	Include hidden files like `-a`
node_limit	int	No	1000	Maximum number of nodes to return
limit	int	No	None	Alias for `node_limit`

Entry Structure

python

{
    "name": "docs",           # File/directory name
    "size": 4096,             # Size in bytes
    "mode": 16877,            # File mode
    "modTime": "2024-01-01T00:00:00Z",  # ISO timestamp
    "isDir": True,            # True if directory
    "uri": "viking://resources/docs/",  # Viking URI
    "meta": {}                # Optional metadata
}

Python SDK (Embedded / HTTP)

python

entries = client.ls("viking://resources/")
for entry in entries:
    type_str = "dir" if entry['isDir'] else "file"
    print(f"{entry['name']} - {type_str}")

HTTP API

GET /api/v1/fs/ls?uri={uri}&simple={bool}&recursive={bool}

bash

# Basic listing
curl -X GET "http://localhost:1933/api/v1/fs/ls?uri=viking://resources/" \
  -H "X-API-Key: your-key"

# Simple path list
curl -X GET "http://localhost:1933/api/v1/fs/ls?uri=viking://resources/&simple=true" \
  -H "X-API-Key: your-key"

# Recursive listing
curl -X GET "http://localhost:1933/api/v1/fs/ls?uri=viking://resources/&recursive=true" \
  -H "X-API-Key: your-key"

CLI

bash

openviking ls viking://resources/ [--simple] [--recursive]

Response

json

{
  "status": "ok",
  "result": [
    {
      "name": "docs",
      "size": 4096,
      "mode": 16877,
      "modTime": "2024-01-01T00:00:00Z",
      "isDir": true,
      "uri": "viking://resources/docs/"
    }
  ],
  "time": 0.1
}

tree()

Get directory tree structure.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI
output	str	No	`agent`	Output format: `agent` or `original`
abs_limit	int	No	256	Abstract length limit for `agent` output
show_all_hidden	bool	No	False	Include hidden files like `-a`
node_limit	int	No	1000	Maximum number of nodes to return
limit	int	No	None	Alias for `node_limit`
level_limit	int	No	3	Maximum directory depth to traverse

Python SDK (Embedded / HTTP)

python

entries = client.tree("viking://resources/")
for entry in entries:
    type_str = "dir" if entry['isDir'] else "file"
    print(f"{entry['rel_path']} - {type_str}")

HTTP API

GET /api/v1/fs/tree?uri={uri}

bash

curl -X GET "http://localhost:1933/api/v1/fs/tree?uri=viking://resources/" \
  -H "X-API-Key: your-key"

CLI

bash

openviking tree viking://resources/my-project/

Response

json

{
  "status": "ok",
  "result": [
    {
      "name": "docs",
      "size": 4096,
      "isDir": true,
      "rel_path": "docs/",
      "uri": "viking://resources/docs/"
    },
    {
      "name": "api.md",
      "size": 1024,
      "isDir": false,
      "rel_path": "docs/api.md",
      "uri": "viking://resources/docs/api.md"
    }
  ],
  "time": 0.1
}

stat()

Get file or directory status information.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI

Python SDK (Embedded / HTTP)

python

info = client.stat("viking://resources/docs/api.md")
print(f"Size: {info['size']}")
print(f"Is directory: {info['isDir']}")

HTTP API

GET /api/v1/fs/stat?uri={uri}

bash

curl -X GET "http://localhost:1933/api/v1/fs/stat?uri=viking://resources/docs/api.md" \
  -H "X-API-Key: your-key"

CLI

bash

openviking stat viking://resources/my-project/docs/api.md

Response

json

{
  "status": "ok",
  "result": {
    "name": "api.md",
    "size": 1024,
    "mode": 33188,
    "modTime": "2024-01-01T00:00:00Z",
    "isDir": false,
    "uri": "viking://resources/docs/api.md"
  },
  "time": 0.1
}

mkdir()

Create a directory.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI for the new directory
description	str	No	`null`	Initial directory description. When provided, it is written to `.abstract.md` and queued for L0 vectorization.

Python SDK (Embedded / HTTP)

python

client.mkdir("viking://resources/new-project/")
client.mkdir("viking://resources/new-project/", description="API docs directory")

HTTP API

POST /api/v1/fs/mkdir

bash

curl -X POST http://localhost:1933/api/v1/fs/mkdir \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-key" \
  -d '{
    "uri": "viking://resources/new-project/",
    "description": "API docs directory"
  }'

CLI

bash

openviking mkdir viking://resources/new-project/
openviking mkdir viking://resources/new-project/ --description "API docs directory"

Response

json

{
  "status": "ok",
  "result": {
    "uri": "viking://resources/new-project/"
  },
  "time": 0.1
}

rm()

Remove file or directory.

rm is idempotent: removing a valid URI that does not exist still succeeds. Invalid URI formats, unsupported schemes, and non-public scopes return INVALID_URI.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI to remove
recursive	bool	No	False	Remove directory recursively

Python SDK (Embedded / HTTP)

python

# Remove single file
client.rm("viking://resources/docs/old.md")

# Remove directory recursively
client.rm("viking://resources/old-project/", recursive=True)

HTTP API

DELETE /api/v1/fs?uri={uri}&recursive={bool}

bash

# Remove single file
curl -X DELETE "http://localhost:1933/api/v1/fs?uri=viking://resources/docs/old.md" \
  -H "X-API-Key: your-key"

# Remove directory recursively
curl -X DELETE "http://localhost:1933/api/v1/fs?uri=viking://resources/old-project/&recursive=true" \
  -H "X-API-Key: your-key"

CLI

bash

openviking rm viking://resources/old.md [--recursive]

Response

json

{
  "status": "ok",
  "result": {
    "uri": "viking://resources/docs/old.md"
  },
  "time": 0.1
}

mv()

Move file or directory.

Parameters

Parameter	Type	Required	Default	Description
from_uri	str	Yes	-	Source Viking URI
to_uri	str	Yes	-	Destination Viking URI

Python SDK (Embedded / HTTP)

python

client.mv(
    "viking://resources/old-name/",
    "viking://resources/new-name/"
)

HTTP API

POST /api/v1/fs/mv

bash

curl -X POST http://localhost:1933/api/v1/fs/mv \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-key" \
  -d '{
    "from_uri": "viking://resources/old-name/",
    "to_uri": "viking://resources/new-name/"
  }'

CLI

bash

openviking mv viking://resources/old-name/ viking://resources/new-name/

Response

json

{
  "status": "ok",
  "result": {
    "from": "viking://resources/old-name/",
    "to": "viking://resources/new-name/"
  },
  "time": 0.1
}

grep()

Search content by pattern.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI to search in
pattern	str	Yes	-	Search pattern (regex)
case_insensitive	bool	No	False	Ignore case
exclude_uri	str	No	None	URI prefix to exclude from search
node_limit	int	No	None	Maximum number of nodes to search
level_limit	int	No	5	Maximum directory depth to traverse

Python SDK (Embedded / HTTP)

python

results = client.grep(
    "viking://resources/",
    "authentication",
    case_insensitive=True
)

print(f"Found {results['count']} matches")
for match in results['matches']:
    print(f"  {match['uri']}:{match['line']}")
    print(f"    {match['content']}")

HTTP API

POST /api/v1/search/grep

bash

curl -X POST http://localhost:1933/api/v1/search/grep \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-key" \
  -d '{
    "uri": "viking://resources/",
    "pattern": "authentication",
    "case_insensitive": true
  }'

CLI

bash

openviking grep viking://resources/ "authentication" [--ignore-case]

Response

json

{
  "status": "ok",
  "result": {
    "matches": [
      {
        "uri": "viking://resources/docs/auth.md",
        "line": 15,
        "content": "User authentication is handled by..."
      }
    ],
    "count": 1
  },
  "time": 0.1
}

glob()

Match files by pattern.

Parameters

Parameter	Type	Required	Default	Description
pattern	str	Yes	-	Glob pattern (e.g., `*/.md`)
uri	str	No	"viking://"	Starting URI
node_limit	int	No	None	Maximum number of matches to return

Python SDK (Embedded / HTTP)

python

# Find all markdown files
results = client.glob("**/*.md", "viking://resources/")
print(f"Found {results['count']} markdown files:")
for uri in results['matches']:
    print(f"  {uri}")

# Find all Python files
results = client.glob("**/*.py", "viking://resources/")
print(f"Found {results['count']} Python files")

HTTP API

POST /api/v1/search/glob

bash

curl -X POST http://localhost:1933/api/v1/search/glob \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-key" \
  -d '{
    "pattern": "**/*.md",
    "uri": "viking://resources/"
  }'

CLI

bash

openviking glob "**/*.md" [--uri viking://resources/]

Response

json

{
  "status": "ok",
  "result": {
    "matches": [
      "viking://resources/docs/api.md",
      "viking://resources/docs/guide.md"
    ],
    "count": 2
  },
  "time": 0.1
}

link()

Create relations between resources.

Parameters

Parameter	Type	Required	Default	Description
from_uri	str	Yes	-	Source URI
to_uris	str or List[str]	Yes	-	Target URI(s)
reason	str	No	""	Reason for the link

Python SDK (Embedded / HTTP)

python

# Single link
client.link(
    "viking://resources/docs/auth/",
    "viking://resources/docs/security/",
    reason="Security best practices for authentication"
)

# Multiple links
client.link(
    "viking://resources/docs/api/",
    [
        "viking://resources/docs/auth/",
        "viking://resources/docs/errors/"
    ],
    reason="Related documentation"
)

HTTP API

POST /api/v1/relations/link

bash

# Single link
curl -X POST http://localhost:1933/api/v1/relations/link \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-key" \
  -d '{
    "from_uri": "viking://resources/docs/auth/",
    "to_uris": "viking://resources/docs/security/",
    "reason": "Security best practices for authentication"
  }'

# Multiple links
curl -X POST http://localhost:1933/api/v1/relations/link \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-key" \
  -d '{
    "from_uri": "viking://resources/docs/api/",
    "to_uris": ["viking://resources/docs/auth/", "viking://resources/docs/errors/"],
    "reason": "Related documentation"
  }'

CLI

bash

openviking link viking://resources/docs/auth/ viking://resources/docs/security/ --reason "Security best practices"

Response

json

{
  "status": "ok",
  "result": {
    "from": "viking://resources/docs/auth/",
    "to": "viking://resources/docs/security/"
  },
  "time": 0.1
}

relations()

Get relations for a resource.

Parameters

Parameter	Type	Required	Default	Description
uri	str	Yes	-	Viking URI

Python SDK (Embedded / HTTP)

python

relations = client.relations("viking://resources/docs/auth/")
for rel in relations:
    print(f"Related: {rel['uri']}")
    print(f"  Reason: {rel['reason']}")

HTTP API

GET /api/v1/relations?uri={uri}

bash

curl -X GET "http://localhost:1933/api/v1/relations?uri=viking://resources/docs/auth/" \
  -H "X-API-Key: your-key"

CLI

bash

openviking relations viking://resources/docs/auth/

Response

json

{
  "status": "ok",
  "result": [
    {"uri": "viking://resources/docs/security/", "reason": "Security best practices"},
    {"uri": "viking://resources/docs/errors/", "reason": "Error handling"}
  ],
  "time": 0.1
}

unlink()

Remove a relation.

Parameters

Parameter	Type	Required	Default	Description
from_uri	str	Yes	-	Source URI
to_uri	str	Yes	-	Target URI to unlink

Python SDK (Embedded / HTTP)

python

client.unlink(
    "viking://resources/docs/auth/",
    "viking://resources/docs/security/"
)

HTTP API

DELETE /api/v1/relations/link

bash

curl -X DELETE http://localhost:1933/api/v1/relations/link \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your-key" \
  -d '{
    "from_uri": "viking://resources/docs/auth/",
    "to_uri": "viking://resources/docs/security/"
  }'

CLI

bash

openviking unlink viking://resources/docs/auth/ viking://resources/docs/security/

Response

json

{
  "status": "ok",
  "result": {
    "from": "viking://resources/docs/auth/",
    "to": "viking://resources/docs/security/"
  },
  "time": 0.1
}

Viking URI - URI specification
Context Layers - L0/L1/L2
Resources - Resource management

File System ​

WebDAV (Phase 1) ​

API Reference ​

abstract() ​

overview() ​

read() ​

write() ​

ls() ​

tree() ​

stat() ​

mkdir() ​

rm() ​

mv() ​

grep() ​

glob() ​

link() ​

relations() ​

unlink() ​

Related Documentation ​

File System

WebDAV (Phase 1)

API Reference

abstract()

overview()

read()

write()

ls()

tree()

stat()

mkdir()

rm()

mv()

grep()

glob()

link()

relations()

unlink()

Related Documentation