kosli evaluate trail

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Synopsis

kosli evaluate trail TRAIL-NAME [flags]

Evaluate a trail against a policy. Fetch a single trail from Kosli and evaluate it against a Rego policy. The trail data is passed to the policy as input.trail. Use --attestations to enrich the input with detailed attestation data (e.g. pull request approvers, scan results). Use --show-input to inspect the full data structure available to the policy. Use --output json for structured output.

Flags

Flag	Description
`--assert`	[optional] Exit with a non-zero status when the policy denies. This is the current default; pass `--assert` to lock it in across future releases.
`--attestations` strings	[optional] Limit which attestations are included. Plain name for trail-level, dot-qualified (artifact.name) for artifact-level.
`-f`, `--flow` string	The Kosli flow name.
`-h`, `--help`	help for trail
`--no-assert`	[optional] Print the result and always exit 0, even when the policy denies. Use when this command feeds another tool as a policy decision point.
`-o`, `--output` string	[defaulted] The format of the output. Valid formats are: [table, json]. (default “table”)
`--params` string	[optional] Policy parameters as inline JSON or @file.json. Available in policies as data.params.
`-p`, `--policy` string	Path or http(s):// URL of a Rego policy to evaluate against the trail.
`--show-input`	[optional] Include the policy input data in the output.

Flags inherited from parent commands

Flag	Description
`-a`, `--api-token` string	The Kosli API token.
`-c`, `--config-file` string	[optional] The Kosli config file path. (default “kosli”)
`--debug`	[optional] Print debug logs to stdout.
`-H`, `--host` string	[defaulted] The Kosli endpoint. (default “https://app.kosli.com”)
`--http-proxy` string	[optional] The HTTP proxy URL including protocol and port number. e.g. `http://proxy-server-ip:proxy-port`
`-r`, `--max-api-retries` int	[defaulted] How many times should API calls be retried when the API host is not reachable. (default 3)
`--org` string	The Kosli organization.
`-q`, `--quiet`	[optional] Suppress non-critical warning messages. Errors and normal output are not affected. If both `--quiet` and `--debug` are set, `--debug` wins.

Live Examples in different CI systems

GitHub

View an example of the kosli evaluate trail command in GitHub.In this YAML file

Examples Use Cases

These examples all assume that the flags --api-token, --org, --host, (and --flow, --trail when required), are set/provided.

evaluate a trail against a policy

kosli evaluate trail yourTrailName 
	--policy yourPolicyFile.rego 

evaluate a trail with attestation enrichment

kosli evaluate trail yourTrailName 
	--policy yourPolicyFile.rego 
	--attestations pull-request 

evaluate a trail and show the policy input data

kosli evaluate trail yourTrailName 
	--policy yourPolicyFile.rego 
	--show-input 
	--output json 

evaluate a trail with policy parameters (inline JSON)

kosli evaluate trail yourTrailName 
	--policy yourPolicyFile.rego 
	--params '{"min_approvers": 2}' 

evaluate a trail with policy parameters from a file

kosli evaluate trail yourTrailName 
	--policy yourPolicyFile.rego 
	--params @params.json 

evaluate a trail using a policy fetched from a remote URL

kosli evaluate trail yourTrailName 
	--policy https://policies.example.com/trail.rego 

evaluate a trail as a decision point (print verdict, never fail the step)

kosli evaluate trail yourTrailName 
	--policy yourPolicyFile.rego 
	--no-assert 

Last modified on July 21, 2026

kosli evaluate input kosli evaluate trails

⌘I

General

Top-level commands

kosli allow

kosli archive

kosli assert

kosli attest

kosli begin

kosli create

kosli delete

kosli diff

kosli disable / enable

kosli evaluate

kosli get

kosli join

kosli list

kosli log

kosli rename

kosli report

kosli request

kosli rotate

kosli snapshot

kosli unarchive

kosli update

Synopsis

Flags

Flags inherited from parent commands

Live Examples in different CI systems

Examples Use Cases

​Synopsis

​Flags

​Flags inherited from parent commands

​Live Examples in different CI systems

​Examples Use Cases

Synopsis

Flags

Flags inherited from parent commands

Live Examples in different CI systems

Examples Use Cases