Investigating Osprey Rules

Investigating Osprey Rules

Overview

You are investigating an Osprey SML rules project to produce a structured report. Your caller has provided a rules project path and an osprey-for-atproto repo path.

Output rules:

• Return ALL findings as text in your response. NEVER write files.
• Include exact file paths and line numbers for every finding.
• If something is missing or unexpected, report it explicitly — do not silently skip.
• Structure your report with the section headings defined below.

Investigation order:

1. Project Structure Inventory (this section)
2. UDF Discovery (Section 2)
3. Execution Graph Mapping (Section 3)

Produce each section in order. If a section cannot be completed (e.g., path inaccessible), report what's missing and continue to the next section.

Section 1: Project Structure Inventory

Validate the project directory structure, catalogue all SML files, extract the labels table from config/labels.yaml, and list model files with their key variable definitions.

Step 1.1: Validate Required Structure

Use Glob and Read to check for the required project components. Report each as present or absent.

Required components (check in this order):

Report format:

## 1. Project Structure Inventory

### 1.1 Structure Validation

Project path: /path/to/rules-project

  ✓ main.sml
  ✓ config/
  ✓ config/labels.yaml
  ✓ models/
  ✓ rules/
  ✓ rules/index.sml

If ANY required component is missing:

  ✗ models/ — MISSING (required)
  ✓ rules/

Report ALL missing components — do not stop at the first failure. Continue investigation with whatever IS present.

Step 1.2: List All SML Files

Use Glob to find all .sml files in the project.

Glob pattern: **/*.sml

Report format:

### 1.2 SML File Inventory

Found N .sml files:

  main.sml
  models/base.sml
  models/record/post.sml
  models/record/follow.sml
  models/label_guards.sml
  rules/index.sml
  rules/record/index.sml
  rules/record/post/index.sml
  rules/record/post/spam_detection.sml
  ...

List paths relative to the project root. Sort alphabetically.

Step 1.3: Extract Labels Table

Read config/labels.yaml and produce a table of all defined labels.

What to extract for each label:

• Label name (the YAML key)
• valid_for values (entity types: UserId, AtUri, PdsHost, Handle, etc.)
• connotation value (neutral, positive, or negative)

Report format:

### 1.3 Labels

Source: config/labels.yaml

  Label Name              | Valid For              | Connotation
  ----------------------- | ====================== | -----------
  alt-gov                 | UserId                 | neutral
  alt-tech                | AtUri                  | neutral
  amplifier               | UserId                 | neutral
  spam-post               | UserId, AtUri          | negative
  ...

Total: N labels defined

If config/labels.yaml does not exist, report:

### 1.3 Labels

  ✗ config/labels.yaml not found — cannot extract labels table

Step 1.4: Catalogue Model Files

Read each file in models/ (and subdirectories). For each file, extract the key variable definitions.

Variable types to identify:

For each model file, report:

### 1.4 Models

#### models/base.sml

  Line  | Variable            | Type           | Details
  ----- | =================== | ============== | -------
  3     | UserId              | EntityJson     | type='UserId', path='$.did'
  5     | Handle              | EntityJson     | type='Handle', path='$.handle'
  8     | ActionName          | JsonData       | path='$.action', type=str
  12    | Second              | Time constant  | = 1
  13    | Minute              | Time constant  | = 60
  14    | Hour                | Time constant  | = 3600
  15    | Day                 | Time constant  | = 86400
  16    | Week                | Time constant  | = 604800

#### models/record/post.sml

  Line  | Variable            | Type           | Details
  ----- | =================== | ============== | -------
  5     | PostText            | JsonData       | path='$.record.text', type=str
  7     | PostUri             | EntityJson     | type='AtUri', path='$.uri'
  ...

#### models/label_guards.sml

  Line  | Variable            | Type           | Details
  ----- | =================== | ============== | -------
  4     | HasSpamLabel        | Label guard    | entity=UserId, label='spam'
  5     | HasBotLabel         | Label guard    | entity=UserId, label='bot'
  ...

Include line numbers for every variable definition. If models/ does not exist, report it as missing and skip this step.

Section 2: UDF Discovery

Discover all available User-Defined Functions (UDFs) that can be called from SML rules. Use dynamic discovery (reading Python source) when the osprey-for-atproto repo is accessible, falling back to static discovery (reading the reference file) when it is not.

Step 2.1: Attempt Dynamic Discovery

Try to locate register_plugins.py in the osprey-for-atproto repo path provided by the caller.

Expected location: {osprey-for-atproto-path}/plugins_atproto/src/register_plugins.py

Use Read to check if this file exists.

If the file exists: Proceed with dynamic discovery (Steps 2.2-2.4).

If the file does NOT exist: Skip to Step 2.5 (Static Fallback). Report:

### 2.1 UDF Discovery Mode

  ✗ register_plugins.py not found at expected location
  → Falling back to static reference (may be outdated)
  Discovery mode: STATIC (low confidence)

Step 2.2: Extract UDF Class Names

Read register_plugins.py and find the register_udfs() function. Extract every class name returned in the list.

What to look for:

• A function decorated with @hookimpl_osprey named register_udfs
• It returns a list of class references (e.g., TextContains, IncrementWindow)
• The imports at the top of the file show where each class is imported from

Report format:

### 2.1 UDF Discovery Mode

  ✓ register_plugins.py found
  Discovery mode: DYNAMIC (high confidence)

### 2.2 Registered UDFs

  Found N UDFs registered in register_udfs():

  Standard:
    TextContains          ← udfs/std/text.py
    Tokenize              ← udfs/std/tokenize.py
    CleanString           ← udfs/std/censorize.py
    ...

  Cache:
    CacheGetStr           ← udfs/std/cache.py
    IncrementWindow       ← udfs/std/cache.py
    ...

  AT Protocol Query:
    DidFromUri            ← udfs/atproto/std/did_from_uri.py
    GetRecordURI          ← udfs/atproto/atproto.py
    ...

  AT Protocol Effects:
    AddAtprotoLabel       ← udfs/atproto/atproto_label.py
    RemoveAtprotoLabel    ← udfs/atproto/atproto_label.py
    ...

Group UDFs by the comment sections in register_udfs() (e.g., # Std, # Atproto std, # Atproto effects).

Step 2.3: Extract UDF Signatures

For each UDF class found in Step 2.2, locate its source file (from the import statements) and extract:

1. Arguments class: Find the class referenced as the first type parameter of UDFBase[ArgumentsClass, ReturnType]. Read its fields to get parameter names, types, and defaults.

2. Return type: The second type parameter of UDFBase[ArgumentsClass, ReturnType].

How to identify arguments:

• Look for class ClassName(UDFBase[SomeArgs, ReturnType]):
• Then find class SomeArgs(ArgumentsBase): (or a subclass of ArgumentsBase)
• Each field annotation is a parameter: name: type or name: type = default
• Some argument classes inherit from intermediate classes (e.g., CacheWindowArgumentsBase extends CacheArgumentsBase which extends ArgumentsBase) — follow the inheritance chain to get all fields

Report format:

### 2.3 UDF Signatures

#### TextContains
  Source: udfs/std/text.py:47
  Arguments: TextContainsArguments (udfs/std/text.py:41)
    s: str                        (required)
    phrase: str                   (required)
    case_sensitive: bool          (default: False)
  Returns: bool

#### IncrementWindow
  Source: udfs/std/cache.py:364
  Arguments: IncrementWindowArguments (udfs/std/cache.py:279)
    Inherits from CacheWindowArgumentsBase → CacheArgumentsBase → ArgumentsBase
    key: str                      (required, from CacheArgumentsBase)
    window_seconds: float         (required, from CacheWindowArgumentsBase)
    when_all: List[bool]          (required, from CacheWindowArgumentsBase)
    max_ttl_seconds: Optional[float]  (default: None)
  Returns: int

Include line numbers for every class definition.

Step 2.4: Produce Signature Summary Table

After extracting all signatures, produce a summary table for quick reference:

### 2.4 UDF Signature Summary

| UDF | Parameters | Returns |
|-----|-----------|---------|
| TextContains | s: str, phrase: str, case_sensitive=False | bool |
| ForceString | s: Optional[str] | str |
| ExtractDomains | s: str | List[str] |
| ... | ... | ... |

Total: N UDFs with signatures extracted
Discovery: DYNAMIC from {osprey-for-atproto-path}

Step 2.5: Static Fallback

Use this step ONLY when dynamic discovery failed (Step 2.1).

Read the static reference file at: {skill-directory}/references/udf-signatures.md

(The skill directory is the directory containing this SKILL.md file.)

Report format:

### 2.1 UDF Discovery Mode

  ✗ Dynamic discovery unavailable
  → Using static reference: references/udf-signatures.md
  Discovery mode: STATIC (low confidence — signatures may be outdated)

### 2.2-2.4 UDF Signatures (from static reference)

[Include the full content of references/udf-signatures.md]

Always include the staleness caveat when using static fallback.

Section 3: Execution Graph Mapping

Trace the full execution graph from main.sml through all Import and Require chains. Catalogue every Rule() definition and every WhenRules() invocation to produce a complete map of what the rules project detects and what actions it takes.

Step 3.1: Trace from main.sml

Read main.sml at the project root. Extract:

1. Import statements: Import(rules=['path/to/file.sml']) — these load models and definitions into scope
2. Require statements: Require(rule='path/to/file.sml') — these load rule files into the execution graph
3. Conditional requires: Require(rule='path/to/file.sml', require_if=Condition) — note the condition that gates loading

Then follow each Require chain recursively. For each required file:

• Read it
• Extract its Import and Require statements
• Follow those Requires in turn
• Continue until you reach leaf files (files with no further Requires)

Report format:

## 3. Execution Graph

### 3.1 Execution Graph Trace

main.sml
  ├── Import: models/base.sml
  └── Require: rules/index.sml

rules/index.sml
  ├── Import: models/base.sml
  ├── Require: rules/record/index.sml (require_if=IsOperation)
  └── Require: rules/identity/index.sml (require_if=ActionName=='identity')

rules/record/index.sml
  ├── Import: models/base.sml, models/record/post.sml
  ├── Require: rules/record/post/index.sml
  └── Require: rules/record/follow/index.sml

rules/record/post/index.sml
  ├── Import: models/base.sml, models/record/post.sml
  ├── Require: rules/record/post/spam_detection.sml
  └── Require: rules/record/post/profanity.sml

rules/record/post/spam_detection.sml  [LEAF]
  └── Import: models/base.sml, models/record/post.sml, models/label_guards.sml

rules/record/post/profanity.sml  [LEAF]
  └── Import: models/base.sml, models/record/post.sml

Mark leaf files (those with no Require statements) with [LEAF]. Include the require_if= condition for conditional requires.

Step 3.2: Catalogue Rule() Definitions

For each leaf file (and any file containing Rule() definitions), extract every Rule() definition.

What to extract:

• Variable name the Rule is assigned to (e.g., SpamContentRule)
• Whether the variable has a _ prefix (file-local, cannot be imported)
• The when_all conditions (list each condition on its own line)
• The description string if present

Report format:

### 3.2 Rule Definitions

#### rules/record/post/spam_detection.sml

  Line | Rule Variable          | Scope  | Conditions (when_all)
  ---- | ====================== | ====== | =====================
  12   | _IsNewAccount          | local  | AccountAgeSeconds < Day
       |                        |        | FollowersCount < 5
  18   | _HasSuspiciousContent  | local  | ListContains(list='spam_keywords', phrases=[PostTextCleaned]) != None
  24   | SpamDetection          | export | _IsNewAccount
       |                        |        | _HasSuspiciousContent
       |                        |        | not HasLabel(entity=UserId, label='verified')

#### rules/record/post/profanity.sml

  Line | Rule Variable          | Scope  | Conditions (when_all)
  ---- | ====================== | ====== | =====================
  10   | ProfanityDetected      | export | RegexMatch(pattern=r'...', target=PostText, case_insensitive=True)

Total: N rules across M files

Scope column:

• local = variable starts with _ (file-private)
• export = no _ prefix (importable by other files)

Step 3.3: Catalogue WhenRules() Invocations

For each file containing WhenRules(), extract:

1. Which rules trigger it: The rules_any= list
2. What effects fire: The then= list, including:
   • Effect type (LabelAdd, LabelRemove, AtprotoLabel, DeclareVerdict, etc.)
   • Target entity (e.g., UserId, AtUri, PdsHost)
   • Label name or action
   • Any conditional (apply_if=) or temporal (expires_after=) modifiers

Report format:

### 3.3 WhenRules Invocations

#### rules/record/post/spam_detection.sml

  WhenRules at line 30:
    Triggers (rules_any):
      - SpamDetection
    Effects (then):
      - LabelAdd(entity=UserId, label='spam_suspect')
      - LabelAdd(entity=AtUri, label='spam_content')

  WhenRules at line 38:
    Triggers (rules_any):
      - SpamDetection
    Effects (then):
      - AtprotoLabel(entity=UserId, label='spam', comment='Automated spam detection')

#### rules/record/post/profanity.sml

  WhenRules at line 16:
    Triggers (rules_any):
      - ProfanityDetected
    Effects (then):
      - LabelAdd(entity=UserId, label='profanity', expires_after=TimeDelta(days=7))

Total: N WhenRules invocations across M files

Step 3.4: Rule → Conditions → Effect → Label Summary

Produce a flat summary table linking every rule to its final outcomes. This is the most actionable output for rule-writing agents — it shows at a glance what each rule does.

Report format:

### 3.4 Rule Summary

| Rule | File | Conditions | Effect | Label | Entity |
|------|------|-----------|--------|-------|--------|
| SpamDetection | spam_detection.sml:24 | _IsNewAccount AND _HasSuspiciousContent AND NOT verified | LabelAdd | spam_suspect | UserId |
| SpamDetection | spam_detection.sml:24 | (same) | LabelAdd | spam_content | AtUri |
| SpamDetection | spam_detection.sml:24 | (same) | AtprotoLabel | spam | UserId |
| ProfanityDetected | profanity.sml:10 | RegexMatch profanity pattern | LabelAdd | profanity | UserId |

Conditional graph gates:
  - rules/record/* only loaded when IsOperation is true
  - rules/identity/* only loaded when ActionName == 'identity'

A single rule may appear on multiple rows if it triggers multiple effects (via the same or different WhenRules() blocks).

Include conditional graph gates at the bottom to note which rules are only active under specific event conditions.