From LSWiki

Contents 1 Familiar 1.1 Requirements 1.2 Boons 1.2.1 Attributes 1.2.2 Charms 1.2.3 Tier 1 1.2.4 Tier 2 1.2.5 Tier 3 1.2.6 Tier 4 1.2.7 Other Boons 1.3 Innate Abilities 1.3.1 Psychic Talents

Familiar

 This is a female cat with dark gray fur and hazel eyes.  She seems more
 gregarious and bright than most cats.  Her eyes take in her surroundings with
 a piercing, even analytical gaze. She looks about six and a twentieth dimins long, one and
 a half dimins wide and three and a twentieth dimins tall. 

While they may seem like normal cats at first glance, they are much more. Psionic cats are incredible psychics themselves and have the potential to turn their consort into a master of the psychic talents they possess.

Requirements

You imagine what it would be like to have a deep bond with the stray black tomcat, and you feel a distinct echo from within him.

You experience feelings of autonomy, giftedness, acuity, and idealism.

Apparently any amount of Telepathy skill (minimum of 1) is all that is required. Typically just bonding to a psionic matrix will suffice. Note that you need a psychic talent to actually bond to a matrix.

Boons

Attributes

As far as has been seen, a psionic cat consort gains bonuses to their dexterity, intelligence and charisma.

Charms

• Urge
• Call
• Send
• Kinsee

Early Robust

• Starsee.

Resilient

• Conjoin

Tier 1

Immediately upon bonding Bonus specialties and access granted to:

• Channeling
• Matrix Interface
• Metacreativity
• Metasenses
• Psychokinesis
• Psycholeptesis
• Redaction
• Telepathy
• Translocation
• Urge charm

Shortly afterwards

• Send charm
• Call charm

Tier 2

at the end of very frail

• Centering
• Kinsee charm

Tier 3

at healthy bond

• +2 bonus to
  • Telepathy
  • Channeling

Tier 4

at very healthy

• +1 bonus spec in
  • stealth.
• +2 bonus spec in
  • matrix interface
  • metacreativity
  • metasenses
  • psychokinesis
  • psycholeptesis
  • redaction
  • translocation.

half way through deep +3 bonus to all psi skills and channeling

Other Boons

   You pet Omoihi with your left claw.

   You sense a swell of telepathic energy flowing into your spirit.

When you pet a psionic cat, you obtain this buff, which is a telepathy buff among other things. Note that while you can poke your familiar to give them back the energies, be warned that they may not like being poked and may retaliate with the usage of an offensive psychic ability.

Hopefully someone else can confirm but also seem to get 1 point in the Night vision trait around the beginning of deep (possibly earlier)

Innate Abilities

Abilities the familiar may have before bonding.

Psychic Talents

All psionic cats, as far as has been recorded, are mindspeakers. Many of them possess an alarmingly large number of talents, but they are also typically very, very good at their talents, far exceeding their consorts initially and possibly in the long run.

You can have the cat do "report wild talents" to have them use their mindspeaker talent to tell you all of the talents they possess. Alternatively, you can conjoin with your familiar to view their helpfiles.