Struct Unit 

pub struct Unit {

    pub id: String,
    pub title: String,
    pub slug: Option<String>,
    pub status: Status,
    pub priority: u8,
    pub created_at: DateTime<Utc>,
    pub updated_at: DateTime<Utc>,
    pub description: Option<String>,
    pub acceptance: Option<String>,
    pub notes: Option<String>,
    pub design: Option<String>,
    pub labels: Vec<String>,
    pub assignee: Option<String>,
    pub closed_at: Option<DateTime<Utc>>,
    pub close_reason: Option<String>,
    pub parent: Option<String>,
    pub dependencies: Vec<String>,
    pub verify: Option<String>,
    pub fail_first: bool,
    pub checkpoint: Option<String>,
    pub attempts: u32,
    pub max_attempts: u32,
    pub claimed_by: Option<String>,
    pub claimed_at: Option<DateTime<Utc>>,
    pub is_archived: bool,
    pub produces: Vec<String>,
    pub requires: Vec<String>,
    pub on_fail: Option<OnFailAction>,
    pub on_close: Vec<OnCloseAction>,
    pub history: Vec<RunRecord>,
    pub outputs: Option<Value>,
    pub max_loops: Option<u32>,
    pub verify_timeout: Option<u64>,
    pub unit_type: String,
    pub last_verified: Option<DateTime<Utc>>,
    pub stale_after: Option<DateTime<Utc>>,
    pub paths: Vec<String>,
    pub attempt_log: Vec<AttemptRecord>,
    pub created_by: Option<String>,
    pub feature: bool,
    pub decisions: Vec<String>,
    pub model: Option<String>,
}

A single unit of work managed by mana.

Units live on disk as Markdown files with YAML frontmatter. All fields are serializable; optional fields are omitted from YAML when None or empty to keep files readable.

Most callers should construct units via Unit::try_new and mutate them through the high-level API functions in crate::api rather than building them directly.

Fields

id: String

title: String

slug: Option<String>

status: Status

priority: u8

created_at: DateTime<Utc>

updated_at: DateTime<Utc>

description: Option<String>

acceptance: Option<String>

notes: Option<String>

design: Option<String>

labels: Vec<String>

assignee: Option<String>

closed_at: Option<DateTime<Utc>>

close_reason: Option<String>

parent: Option<String>

dependencies: Vec<String>

verify: Option<String>

Shell command that must exit 0 to close the unit.

fail_first: bool

Whether this unit was created with –fail-first (enforced TDD). Records that the verify command was proven to fail before creation.

checkpoint: Option<String>

Git commit SHA recorded when verify was proven to fail at claim time. Proves the test was meaningful at the point work began.

attempts: u32

How many times the verify command has been run.

max_attempts: u32

Maximum verify attempts before escalation (default 3).

claimed_by: Option<String>

Agent or user currently holding a claim on this unit.

claimed_at: Option<DateTime<Utc>>

When the claim was acquired.

is_archived: bool

Whether this unit has been moved to the archive.

produces: Vec<String>

Artifacts this unit produces (types, functions, files). Used by decompose skill for dependency inference.

requires: Vec<String>

Artifacts this unit requires from other units. Maps to dependencies via sibling produces.

on_fail: Option<OnFailAction>

Declarative action to execute when verify fails.

on_close: Vec<OnCloseAction>

Declarative actions to execute when this unit is closed. Runs after archive and post-close hook. Failures warn but don’t revert.

history: Vec<RunRecord>

Structured history of verification runs.

outputs: Option<Value>

Structured output from verify commands (arbitrary JSON).

max_loops: Option<u32>

Maximum agent loops for this unit (overrides config default, 0 = unlimited).

verify_timeout: Option<u64>

Timeout in seconds for the verify command (overrides config default). If the verify command exceeds this limit, it is killed and treated as failure.

unit_type: String

Unit type: ‘task’ (default) or ‘fact’ (verified knowledge).

last_verified: Option<DateTime<Utc>>

Unix timestamp of last successful verify (for staleness detection).

stale_after: Option<DateTime<Utc>>

When this fact becomes stale (created_at + TTL). Only meaningful for facts.

paths: Vec<String>

File paths this unit is relevant to (for context relevance scoring).

attempt_log: Vec<AttemptRecord>

Structured attempt tracking: [{num, outcome, notes}]. Tracks claim→close cycles for episodic memory.

created_by: Option<String>

Identity of who created this unit (resolved from config/git/env).

feature: bool

Whether this unit is a feature (product-level goal, human-only close).

decisions: Vec<String>

Unresolved decisions that block autonomous execution. Each entry is a question that must be answered before an agent starts work. Empty list means no blocking decisions.

model: Option<String>

Override model for this unit. Takes precedence over config-level model settings. Used as {model} substitution in command templates.

Implementations

impl Unit

pub fn try_new( id: impl Into<String>, title: impl Into<String>, ) -> Result<Unit, Error>

Create a new unit with sensible defaults. Returns an error if the ID is invalid.

pub fn new(id: impl Into<String>, title: impl Into<String>) -> Unit

Create a new unit with sensible defaults. Panics if the ID is invalid. Prefer try_new for fallible construction.

pub fn effective_max_loops(&self, config_max: u32) -> u32

Get effective max_loops (per-unit override or config default). A value of 0 means unlimited.

pub fn effective_verify_timeout( &self, config_timeout: Option<u64>, ) -> Option<u64>

Get effective verify_timeout: unit-level override, then config default, then None.

pub fn from_string(content: &str) -> Result<Unit, Error>

Parse a unit from a string (either YAML or Markdown with YAML frontmatter).

pub fn from_file(path: impl AsRef<Path>) -> Result<Unit, Error>

Read a unit from a file (supports both YAML and Markdown with YAML frontmatter).

pub fn to_file(&self, path: impl AsRef<Path>) -> Result<(), Error>

Write this unit to a file. For .md files, writes markdown frontmatter format (YAML between --- delimiters with description as the markdown body). For other extensions, writes pure YAML.

pub fn hash(&self) -> String

Calculate SHA256 hash of canonical form.

Used for optimistic locking. The hash is calculated from a canonical JSON representation with transient fields cleared.

pub fn from_file_with_hash( path: impl AsRef<Path>, ) -> Result<(Unit, String), Error>

Load unit with version hash for optimistic locking.

Returns the unit and its content hash as a tuple. The hash can be compared before saving to detect concurrent modifications.

pub fn apply_value( &mut self, field: &str, json_value: &str, ) -> Result<(), Error>

Apply a JSON-serialized value to a field by name.

Used by conflict resolution to set a field to a chosen value. The value should be JSON-serialized (e.g., "\"hello\"" for a string).

Arguments

• field - The field name to update
• json_value - JSON-serialized value to apply

Returns

• Ok(()) on success
• Err if field is unknown or value cannot be deserialized

Trait Implementations

impl Clone for Unit

fn clone(&self) -> Unit

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Unit

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Unit

fn deserialize<__D>( __deserializer: __D, ) -> Result<Unit, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<&Unit> for IndexEntry

fn from(unit: &Unit) -> IndexEntry

Converts to this type from the input type.

impl PartialEq for Unit

fn eq(&self, other: &Unit) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Unit

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Unit